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SmartWise T4 EU 3C 3-gang WiFi+RF smart light switch (single-live-wire, works without neutral) (R2, white)

SmartWise T4 EU 3C is a 3-gang WiFi + RF receiver equipped smart light switch remotely controllable via the internet from mobile app. Can be two-way switched with wireless SmartWise RF switches and from Sonoff remote controls. Works with a single live wire, no need for neutral wire!

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Supported protocols:
RF receiver (433 MHz), Wi-Fi
in stock (7 pcs)

SmartWise T4 EU 3C smart light switch - similarly to Sonoff TX T4 EU 1C  - works without neutral, with live wire input only, that is can be installed as a replacement of any EU traditional switches. It has a built-in WiFi and RF receiver chip, so it can be paired with a wireless second/third etc. RF switch, such as SmartWise RF switches, and thus can be used for two-way switching.

The new R2 version, released in late 2020 has identical technical specification as previous R1 version but a different, updated glass touch panel.

It is advised to use the live-only switch for switching lights only. Compatible lights include: tungsten, LED and CFL lamps. Not recommended for switching other electric devices.

It's a 3-gang single live wire EU Wi-Fi smart wall touch switch that doesn’t require a neutral wire, being installed easily without rewiring your existing wire. It features a toughened glass panel  which keeps a new and clean outlook after being used frequently, comes with anti-fingerprint design.

The LED backlight comes with a weak brightness, which helps to find the switch at night but not disturbingly bright. It's equipped with very sensitive touch buttons.

App remote control supports to manage lights to turn on or off, making a lighted home ready to welcome you when you come back home at dusk. The kitchen light is still on after a meal but you are immersed into the movies and don’t want to leave the sofa? Simply talk to the connected Alexa or Google Home, it will turn off the light instantly once listen to your command.

SmartWise T4 EU switch also has an RF receiver, so it can be wirelessly switched with a Sonoff remote control or a SmartWise RF wall switch, making it possible to pair it with wireless RF switches for two-way or three-way switch scenarios.

Timing schedule is an absolutely decent choice if you need to turn on devices in advance, or just forget turning them off. Set a scene for your devices in your home, and tap the on/off icon once on the scene mode to turn on or off single devices or all devices of the entire home, no need to operate over and over again on APP.

Share the device with your family to grant the control ability to them directly, simplifying the pairing and adding steps. LAN control allows you to control connected devices even though there is no internet in your home. Struggle to recall whether you had turned off the lights when you are on your way to work? You can find the answer on sync status, just check if it's on or off.

SmartWise T4 EU single-live-wire smart switch also has a 1-gang and a 2-gang version.

Please note that this single-live-wire product comes with a small anti-flicker module, included in the product box. This anti-flicker module needs to be installed not at the switch but at the controlled electric device (e.g. lamp or bulb) to the live and neutral wires.
In most cases the single-live-wire switch cannot work without this small module installed, or it may cause the lamp to turn on/off randomly or the light may flicker.


  • Works without neutral, with single live wire only. Can be installed as a replacement of practically all EU traditional switches.
  • Product comes with one anti-flicker module, to be installed to one of the controlled gangs. It prevents vibration of small consumption LED lights.
  • Touch switch - touch switch and WiFi activity LED on glass front
  • Dimension meets EU standards 86x86mm front panel meets EU standards, 35mm depth, inside-the-wall part also meets EU standard.
  • 433MHz-es radio-control support – remote radio-control, integrates with SmartWise radio-controlled wireless switches (used as a second switch).
  • Remote ON / OFF – Anytime, anywhere, from now on you can turn all lights on and off remotely
  • Mobil App support – Free iOS and Android mobile App: eWeLink
  • Sync status – Check actual switch status (turned ON or OFF) with the mobile App
  • Timer – Various of timer functions: single time, scheduled turn on/off, countdown/timer, loop.
  • Share control – Control the device together with your family
  • Scene – Turn ON / OFF a gang of devices with one tap
  • Smart scene – Triggered on/off by temp, hum or other environmental conditions from the sensor
  • Compatibility - Works perfectly with Amazon Alexa, Google Assistant, IFTTT and Google Nest
  • Recommended only for switching lights only. Compatible lights include: tungsten, LED and CFL lamps. 
    • Min. load: 3W for incadescent lights: 3 W; max. load for incadescent lights: 300W / gang
    • Min. load: 3W for LED lights: 3W; max. load for LED lights: 100W / gang

Product type:
3-gangs smart switch
white, elegant tempered glass panel, without frame
Device power supply:
180V-240V AC
230V AC just live
can be installed in standard EU wall box
Operating temperature range:
indoor use
Dimmer feature:
Power consumption metering:
Number of gangs / circuits:
Rated voltage (output):
180V-240V AC
Rated current (output):
3-300W / circuit
Physical on/off button on device:
touch switch, 3 touch buttons
External switch supported:
no, just wireless RF switches
2-way or 3-way switching:
only wireless RF433MHz switches can be used as a second/third switch, yes, but just wireless RF switches as additional switch
Momentary switching (inching):
Interlock mode:
Wi-Fi standards:
802.11 b/g/n (2.4GHz)
RF transmitter / receiver:
yes (RF receiver) - remote controller can be ordered separately
Controllable from internet:
Manufacturer smartphone app:
yes, eWeLink (Android, iOS)
Web admin interface:
on/off mode (only with subscription, Premium feature)
Voice control:
Amazon Alexa and Google Assistant compatible
Cloud mode:
yes, default mode is to connect to the eWeLink cloud
LAN mode:
yes, but only if the connection with the eWeLink cloud is disconnected (or banned), limited feutures,
REST API support:
MQTT support:
Supported integrations:
Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT (IFTTT integration with subscription, Premium feature)
Schedulers, timers:
yes, 8 timings on the device in offline mode, any further timing can be run from the cloud in online mode
Notification functions:
eWeLink app notification on smartphone
yes, on/off history in logged in eWeLink cloud
160 g/pcs
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SmartWise T4 EU 3C 3-gang WiFi+RF smart light switch (single-live-wire, works without neutral) (R2, white)
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