User Manual
Stereo Wireless ANC Headphones
BTHS-AS90
Product Overview ·······················································································································································································1
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Basic Operation ····························································································································································································1
LED indicator ·································································································································································································2
Activate noise cancellation (ANC) ·························································································································································2
Connect to a Bluetooth device ·······························································································································································3
Reconnect to Bluetooth device ······························································································································································3
Using as a wired headphone ···································································································································································3
Charging ·········································································································································································································4
Clear the headphones pairing history ·················································································································································4
Troubleshooting ··························································································································································································4
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Product Overview
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• Bluetooth version: V4.1
• Supported audio format(s): SBC, FastStream
• Driver diameter: 40mm
• Impedance: 32ohm
• Frequency response: 20Hz-20KHz
• Working time: Up to 35 hours music time
• Charging time: approx. 2 hours
• Ear pads inner diameter: 6cm (length)* 3.7cm(width)
• Ear pads outer diameter: 9.5cm (length)* 7.5cm(width)
• Product weight: 230g
Please read this User Guide carefully and keep it handy
For more AS90 product information please see support.avantree.com or search “AS90”
or “Avantree Aria” on www.avantree.com
Basic Operation
General function
Power On Slide the power switch towards middle
Slide the power switch towards
Activate/ deactivate smart voice assistant Press once (wireless connected, non-calling status)
Press and hold both
and for 1s to deactivate voice
prompts
2
Music Control >
Play / Pause music Press once
Volume up / down Press
/ once
Next / Previous track Hold
/ for 2s
Call Control >
Answer / End a call Press once
Reject a call Hold
for 2s with a call coming-in
Last number redial Press
twice
On the headset - Press
once during an active call
On boom mic –Mute on
LED indicator
Working Status LED indicator
ANC ON ANC indicator* shows GREEN
ANC OFF ANC indicator* turns OFF
Pairing Mode Blinks BLUE & RED alternately
Connected Blinks BLUE once every 5s
Reconnecting Blinks BLUE once every 1s
Disconnected Blinks BLUE once every 2s
Low battery Blinks RED once every 10s
or indicator solid RED
Play audio in SBC Codec Blinks BLUE once every 5s
Activate noise cancellation (ANC)
After power ON, slide ANC switch to “ANC” to activate the ANC function. The ANC LED light will turn GREEN.
Slide ANC switch opposite to “ANC”
Note:
• You will NOT be able to use the ANC function when the headphones’ battery is low.
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Connect to a Bluetooth device
• Enter headphones into PAIRNG MODE - Slide the power switch to position and hold for 3s until the LED
BLUE and RED alternately.
• On your mobile device – Turn on Bluetooth and select “Avantree AS90” to connect. If you are using a Bluetooth
transmitter, please enter your transmitter into PAIRING MODE (please refer to your transmitter’s user manual).
Reconnect to Bluetooth device
Normally, once powered on, the headphones will reconnect to the last connected device automatically within
5-10 seconds.
If it doesn’t, please slide the Power Switch to
position ONCE ,
OR select “Avantree AS90” from your device to connect manually. (If you’re using a Bluetooth transmitter, please
refer its user manual to reconnect)
Using as a wired headphone
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You may use the supplied 3.5mm audio cable to connect to a non-Bluetooth device.
Note: The control buttons, the built-in mic, and the detachable boom mic DOES NOT work in wired mode.
Note:
Charging
Normally it takes 2 hours to fully recharge. The LED indicator on the headphones will remain RED while charging
and automatically turn o when the charging is complete.
Clear the headphones pairing history
Turn on the headset (Non-calling Status.) Press and hold both and for 5 seconds until the LED blinks
PINK for 2 seconds. Now the pairing history has been cleared. The headphones will enter PAIRING MODE
automatically (LED blinks Blue and Red alternately) and you’ll be able to pair it with the target Bluetooth device
again.
Troubleshooting
No sound with PC?
• Set Avantree AS90 as the default device or output device on the PC.
• When using AS90 to make VOIP calls through apps, please set AS90 Hands-Free as Microphone and Speakers
device.
No sound with Bluetooth transmitter when watching TV?
• Ensure Bluetooth transmitter and headphones are connected properly.
• Check to ensure audio source is functioning properly
When the LED starts blinking RED once every 10s or indicator solid RED, or when you hear “beep” /
prompts sound, you should recharge your headphones. Please plug it into a USB wall charger (DC 5V / 0.5-2A)
or a powered USB port via the micro USB cable that we provided.
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- AUX & RCA output on TV – test with wired headphones
• Change your TV audio out setting to “External speakers /Headset.”
Headphones do not pair with Bluetooth device?
BLUE and RED alternately.
• For Bluetooth transmitters, please ensure that the transmitter is in Pairing mode – you may refer to its user
manual.
• For Smart phones, tablets and PC
• Delete “Avantree AS90” headphones from your device’s Bluetooth list and try to pair again.
• Clear the headphone’s pairing history and pair again.
