Matter Smart Switch
with Volt-free Contacts
MK5
Product Introduction
01
[Works with Major Matter Ecosystems]
MK5 is a Matter-certified Smart Switch with Volt-free Contacts,
compatible with Apple Home, Amazon Alexa, Google Home,
SmartThings, and other Matter platforms. Control devices from
different brands in one app.
[AC/DC Dry Contact Control]
MK5 supports 100–240Vac, 24–48Vdc, and 12Vdc power inputs
for a wide range of home, industrial, and dry contact control
applications.
[Ultra-Compact Design]
Compact and versatile, MK5 fits easily into EU and US standard
wall boxes. Ideal for both new installations and existing switch
upgrades.
[Safety Certifications]
MK5 is FCC, CE, RED, RoHS, and ErP certified, ensuring reliable
operation, electromagnetic compatibility, electrical safety, and
environmental compliance.
[App Control]
Use Matter-compatible apps or the L-Home app for pairing,
switching, cloud scenes, and automations. Use the NFC Lighting
app for quick on-site parameter configuration.
μ
ErP
Dimensions
Unit: mm
39.5
18
33
49
02
Specifications
Model MK5
Wireless Protocol Matter over WiFi
Channels 1
Operating Voltage
Rated Load
Max. 2A (Capacitive);
Max. 5A (Resistive/Inductive)
Relay Inrush Current 70A@10ms
Operating Temperature -10°C~40°C
Dimensions
L39.5×W33×H18(mm)
Weight
24g±5g
Package Size
L43×W58×H24(mm)
Output Current Max. 5A
100-240V~, 50/60Hz
12V /24-48V
Compatible Input Devices Momentary Switch, Rocker Switch
Compatible Loads /
Devices
Garage Doors, Access Control,
Sprinklers, Heating Systems, etc.
Product Overview
03
5 Slow Green
Flashes
Switches to Toggle
Switch Mode
4 Slow Green
Flashes
Switches to Two-Way
Switch Mode
2 Slow Green
Flashes
Switch to Momentary
Switch Mode (Default)
Slow Flashing Red
Factory Reset in Progress
3 Slow Green
Flashes
Switch to Rocker Switch
Mode
Fast Flashing Red
Ready for Factory Reset
Slow Flashing Blue
Firmware Update in
Progress
Indicator Status
Solid Blue
Fast Flashing Blue
Normal
Ready to Pair
Button and LED Indicator Status
Device Status
Press 3 Times
within 1s
-
Button Action
Press and Hold
for 15s, Press 3
Times within 3s
100-240Vac /
24-48Vdc
Input
Momentary /
Rocker
Switch Input
12 Vdc
Input
Function Button
LED Indicator
Dry
Contact
04
①
This device supports Matter and works with major
smart home platforms. Download a compatible app
and make sure your Matter hub is powered on and
online before setup.
Wiring
For electrical safety, install a 5A miniature circuit
breaker (MCB) or residual current circuit breaker
(RCCB) upstream of MK5.
Disconnect the main power supply before wiring.
Installation and maintenance must be performed
by a qualified electrician. Never wire or touch the
terminals while the device is powered.
Follow the wiring diagram carefully. Wire size:
0.5–2.5mm² (24–14AWG). Strip length: 6–7mm.
Do not exceed the rated load.
Matter App & Hub Setup
②
Amazon Alexa
Apple Home
Google Home SmartThings
The SW terminals must not be connected to the
neutral or ground wire, as this may result in device
damage and potential safety hazards.
The device supports two types of external switches:
momentary switches and rocker switches. The default
factory setting is configured for momentary switches.
① 100-240Vac Power Supply
② 24-48Vdc Power Supply
③ 12Vdc Power Supply
+
24-48Vdc
-
+
12Vdc
-
05
Max.240Vac
Max.30Vdc
Max.240Vac
Max.30Vdc
N
100-240Vac
L
Max.240Vac
Max.30Vdc
Add to a Matter Platform
Open a Matter-compatible app, such as Apple Home or
Google Home. Tap "Add Device," then scan the Matter
QR code on the device and follow the on-screen
instructions.
③
Installation
For in-wall installation, use a wall box at least 50mm
deep.
④
EU Wall Box US Wall Box
06
XXXX-XXX-XXXX
≥
5
0
mm
Use with NFC Lighting or L-Home App
Scan the QR code below to download the NFC configuration
tool. Configure Power-On State, Switch Control Type, and other
parameters before pairing. You can also use the L-Home app.
Scan the QR code on the right for the Digital Manual and more
details.
NFC Lighting APP L-Home APP
Digital Manual
07
Factory Reset
Method 1: Press and hold the function button for 15 seconds.
Release it when the indicator flashes red rapidly. Within 3 s,
press the function button 3 times. The indicator will flash red
slowly while the device resets.The reset is complete when the
indicator flashes blue rapidly.
Method 2: Make sure the device is powered on and online. Open
the L-Home app and go to the device settings. Tap "Delete
Device." When "Deleted Successfully" appears, the factory reset
is complete.
Method 3: Make sure the device is powered on. Open the NFC
Lighting app and tap "Read/Write Matter Device."Follow the on-
screen instructions to find and connect the device, then tap
“Factory Reset" on the parameter page.
08
FAQ
This product is designed to comply with the Matter standard. As
Matter is still evolving, some features, performance, and network
stability may be limited by the current version.
Q3: Can the device be used with multiple Matter platforms?
A: Yes. It can be used with multiple platforms as long as they
support Matter.
09
Product performance is subject to the current Matter version.
We will continue to update and optimize the product as Matter
evolves.
Q4: What should I do if 5GHz WiFi is not supported during
pairing?
A: This device supports 2.4GHz WiFi only, not 5GHz. If your
router uses a combined 2.4GHz/5GHz network, disable this
feature in the router settings, connect your phone to the
2.4GHz WiFi network, and try pairing again.
Q2: What loads can the output control?
A: The dry contact output can control garage doors, access
control systems, sprinklers, heating systems, and other dry
contact devices. Each channel supports a maximum resistive
load of 1200 W.
Q1: What power inputs are supported?
A: The device supports 100–240Vac, 24–48Vdc, and 12Vdc
power inputs. See the specifications for details. Do not
connect AC and DC power simultaneously.
FCC Statement
1. 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.
(2)This device must accept any interference received, including
interference that may cause undesired operation.
10
The device has been evaluated to meet general RF exposure
requirement. This equipment should be installed and operated
with a minimum distance of 20 cm between the radiator
and your body.
2. Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s authority
to operate the equipment.
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communi-
cations. 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.
Note: 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
Attention
Product installation and commissioning should be done by a
qualified professional.
11
LTECH products are and not lightningproof non-waterproof
(special models excepted). Please avoid the sun and rain.
When installed outdoors, please ensure they are mounted in
a water proof enclosure or in an area equipped with lightning
protection devices .
Good heat dissipation will prolong the working life of products.
Please ensure good ventilation.
Please check if the working voltage used complies with the
parameter requirements of products.
Use wires with a suitable cross-sectional area to safely carry
the load of the connected LED lights, household appliances,
or other devices. Ensure all wiring connections are secure.
Before you power on products, please make sure all the wiring
is correct in case of incorrect connection that causes damage
to light fixtures.
If a fault occurs, please do not attempt to fix products by your-
self. If you have any question, please contact us or an
authorized dealer.
Updated: 08/17/2026_A0
12
Warranty Agreement
Warranty periods from the date of manufacture: 2 years
Warranty exclusions below:
Following conditions are not within the guarantee range of free
repairing or replacement services:
Beyond warranty periods.
Any artificial damage caused by high voltage, overload, or
improper operations.
Products with severe physical damage.
Damage caused by natural disasters and force majeure.
Warranty labels and barcodes have been damaged.
No any contract or invoice signed by LTECH .
1. Repair or replacement provided is the only remedy for cus-
tomers. LTECH is not liable for any incidental or consequential
damage unless it is within the law.
2. LTECH has the right to amend or adjust the terms of this
warranty. The warranty that issues in writting shall prevail.
* Specifications and contents are subject to change without notice. If the
actual product differs from this manual, the actual product shall prevail.
For questions, please contact us or an authorized dealer.
Free repair or replacement services for quality problems are
provided within warranty periods. Warranty exclusions below:
Email: lt@ltech-led.
Manufacturer: Zhuhai LTECH Technology Co., Ltd.
Address: 1st Building,No. 183, Shui'an 1st Road, Xiangzhou District, 519060
Zhuhai City, PEOPLE'S REPUBLIC OF CHINA
Website: www.ltech-led.com
com
Made in China
