Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
Dual device connection: After device 1 is successfully connected to
the product, turn off the device’s BT function manually and then
connect device 2. After device 2 is successfully connected to the
product, turn on device 1’s BT function and connect it with the
product manually to realize dual device connection
Dual connection
For FAQs and more
information, please scan
Lifetime Warranty Code
482567
support@joyroom.com
Turn on
Turn off
Ready for
pairing
Charging
the product
The LED ring is constantly on for 1s; the battery
level display is constantly on for 5s
The LED ring turns off, the battery level display
turns off
The LED ring breathes slowly
The readings of the digital display vary in real
time according to the battery level
Restore factory settings:
Under turned on status, press and hold the volume
up and down buttons simultaneously for 3s
Factory reset
3s&
Turn on/off bass: Under music status, push the BASS
slider to ON position to turn on BASS mode, push it to
OFF position to turn off BASS mode
Turn on/off BASS mode
BASS
OFFON
Activate or turn off voice assistant: Under music or
standby status, press and hold Multifunctional
button for 1s, and then release after hearing a “di-di”
sound to activate or turn off Siri
1s
Voice assistant
III. Basic parameters
Series name: Car-B Series
Product name: Wireless Receiver
Model: JR-CB2 Pro
BT version: V5.3
Audio decoding: AAC, SBC
Supported protocols: HFP, A2DP, AVRCP
Music mode: BASS, VOCAL
Working frequency: 2402MHz-2480MHz
BT range: 10m (barrier-free open environment)
Frequency response range: 20Hz-20KHz
Mic sensitivity: -38dB±2
Music time: about 26h (70% volume)
Talk time: about 30h (70% volume)
Standby time (connected): about 120h
Battery capacity: 300mAh
Charging time: about 2h
Charging port: TYPE-C
Power input: 5V 1A
Material: ABS+PC+aluminum alloy
Size: 48mm*42mm*15.2mm
Net weight: 34g
IV. Pairing operation
User Manual
JR-CB2 Pro Wireless Receiver
I. Product diagram
II. Packing list
3.5mm
audio
adapter
Charging
cable
3.5mm
audio
cable
Manual &
Warranty
Card
Wireless
Receiver
Adhesive
pad *2
Power button
Volume down
/Previous
Volume
up/Next
Multifunctional button
Battery level display
Type-C charging port
LED ring
3.5mm
audio port
Microphone
Microphone
BASS
slider
JR-CB2 Pro
Press and hold power
button for 1.5s to turn
the product on manually
10min
Turn off
1. Turn on
When the LED ring breathes
slowly, it means the wireless
receiver is ready for pairing.
Turn the phone’s BT function
on and search for the BT device
"JR-CB2 Pro", connect with it.
2. Connected
Press and hold button
for 3s to turn the
product off manually
The product will turn off
automatically if not
connected for 10 minutes
3. Turn off
1.5s
3s
V. Operation instructions
VI. Indicator instructions
1s
1s
x1
Play/Pause: Under music status, click
Multifunctional button to pause or play music
1s
x1
Answer/end call: When a call comes in, click
Multifunctional button to answer it. When you finish
the call, click it again to end the call
Reject call: When a call comes in, press and hold
Multifunctional button for 1s
Previous track:
Under music status, press and hold button for 1s
Next track:
Under music status, press and hold button for 1s
Redial last number: Under music or standby status,
double-click Multifunctional button
Music function
Call function
x2
x3
Turn on/off LED ring:
Under turned on status, triple-click power button
Turn on/off LED ring
Q: Why can’t the receiver be connected?
A: ① It may be that the receiver has been connected to another
device (such as a computer or mobile phone). Please disconnect it
from the device and make a reconnection.
② Since the iP phone’s BT has no automatic refresh function, you
can click “JR-CB2 Pro” manually on the BT interface.
③ If above operations failed, you can restore the receiver to factory
settings.
Q: Why is the sound of the receiver too low?
A: ① If you are an Android user, it may be that the playback channel
of the mobile phone is not turned on. Please turn your phone’s BT
function on, click the icon on the right side of the connected
earphones to turn on the “media channel and call channel”.
② If you are an iP user, please open your phone’s “Settings”
interface, and check if there is a maximum volume limit on the
phone.
③ Due to different operating systems of different phones, the
volume of the receiver may not be synchronized with the volume of
the phone/car audio. Please manually volume up the mobile
phone, the receiver and the car audio respectively.
Q: Why can’t the receiver be turned on when connected
with
power?
A: ① The USB charging port and cable may not be
connected properly, please pull the cable out and plug it in
again repeatedly to make sure it is well inserted.
② Please use adapters or car chargers that conform to
national/regional safety standards to supply power for the
product. Adapters with excessive power may be
incompatible.
VI. FAQ
1. Please follow the instructions, do not disassemble the product or
refit it for any reason, otherwise it may break down or burn down.
2. Do not immerse it in any liquid or wash it with water.
3. Please use adapters that conform to national/regional safety
standards together with the included charging cable to charge the
product, otherwise its battery may be damaged or cause safety
problems.
4. Please use and store it in normal temperatures; too low or too
high temperature (below 0℃ or above 35℃) is not permitted.
5. Do not block the openings of the product, such as charging port,
audio port and microphone, etc.
6. Do not use it under thunderstorm which may lead to abnormal
performance and signal interruption.
VIII. Correct disposal of used electrical
and electronic equipment
This product is in compliance with Directives 2012/19/EU
and 2006/66/EU. It is strictly forbidden to dispose of this
product with ordinary waste, instead it must be recycled.
This symbol indicates that the product shall not be
treated as household waste. Instead it must be handed
over to the applicable collection point for the recycling of
electrical and electronic equipment.
3.1101.620012.0000000
FCC NOTE:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure
requirement.
The device can be used in portable exposure condition without
restriction.
VII. Safety Criterion
② The product does not support PD protocol, when using
PD power adapters to supply power for the product, it may
be incompatible.
3.1101.620012.0000000
原材料 机乐堂 JR-CB2 Pro蓝牙接收器 全英说明书（亚马逊美国站）V1.0
尺寸: 63x75mm
材质: 128g铜版纸+正反单色印刷+风琴折
封面
