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SmartWise T4 EU 4C UNI (R3), black, 4-gang, WiFi+RF smart light switch (works with single-live-wire, and with live+neutral wiring)

SmartWise T4 EU 4C UNI (R3) is a 4-gang smart light wall switch, with WiFi + RF receiver. Just as Sonoff smart switches, it is remotely controllable via the internet from eWeLink smartphone app, and can be also scheduled to turn on/off.  

Thanks to its RF 433MHz receiver, it supports two-way / three-way etc. switching from wireless SmartWise RF433 switches and from Sonoff RF remote controls.

The latest R3 UNI version is a truly universal version, working with both live-only wiring and also supporting live+neutral wiring, so it can be installed to replace literally any European traditional wall switches.

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Supported protocols:
RF receiver (433 MHz), Wi-Fi
last pieces (1 pcs)

SmartWise T4 EU UNI (R3) smart light switch series is the latest, third-generation (R3) universal type of the wall switch family. Recommended wiring is live (phase) + neutral wire, but it also supports wiring with a single live wire, without neutral wire. It's a truly universal solution, which can be installed into any European wall boxes, with or without neutral wire. In case of single-live-wire installation, manufacturer suggests to use it to control only lights, compatible with: Tungsten torch, LED and compact fluorescent lamp (CFL). In case of live wire only installation, it is also necessary to connect a small anti-flicker module (included with the product) to the lamp.

It has an elegant glass front panel and a sensitive touch switch, which you can use turn tunr on/off the lights just as in case of a traditional wall switch.

Just like Sonoff's smart switches, it uses the same eWeLink app and platform, so it can be nicely combined with other brands using eWeLink app, such as Sonoff, SmartWise, KingArt, WDYK and Woolley.

Thanks to the built-in Wi-Fi chip, it connects to eWeLink cloud and you may remotely check the switch on/off status and turn on/off the switch using the free eWeLink app, running on an iOS (Apple) or Android smartphones, all you need in an active Internet connection on your prhone. You may also set scheduled on/offs, and also use time relay feature of the switchto set automatically turn off for after a specified time (also called as inching), to save energy cost by this auto-off feature. Remote control can be shared with others, such as your family members.

It's a perfect solution for smart control of any lamp or lighting. You can use it to remotely control the lights, even when you are not at home. You may also use it a security solution, by programming to turn on and off, so show the outside world that you are at home.

Thanks to its built-in RF 433MHz receiver, this SmartWise switch can be remotely controlled with wireless RF wall switches and RF433MHz radio remote controllers. By using together with wireless RF wall switches, you may set up two-way / three-way etc. switching easily and wirelessly. (In case of multi-gang switches), individual buttons of the smart switch can be paired one by one with the wireless RF switch or remote control buttons, with great flexibility. 

New features of R3 UNI version, compared to previous R2 version: 

  • universal wiring: it can work with single-live-wire or with live+neutral wiring;
  • it also has 4-gang version ;
  • front panel has a slightly different design.

SmartWise T4 EU UNI (R3) smart switch now has 1, 2, 3 and now 4-gang versions, available with white and black glass front panel. 

If you wish to control the lights from multiple places, need 2-way / 3-way / etc. switching, you can pair multiple wireless RF switches with a single wired smart switch.
SmartWise's T1R RF wireless switch series sare compatible with T4 R3 UNI smart switches.

Please note that this product comes with a small anti-flicker module, included in the product box. In case of wiring the switch with live-wire-only (no neutral), then this anti-flicker module needs to be installed at the controlled electric device (e.g. lamp or bulb) to the live and neutral wires.
In most cases the switch with single-live-wiring 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 or with live+neutral wiring, too. 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. Only needed in case of live-only installation.
  • Touch switch - touch switch and WiFi activity LED on glass front
  • EU standards size 86x86mm front panel, 35mm depth, can be installed in EU wall boxes.
  • 433MHz RF radio-control support – remote radio-control, integrates with SmartWise radio-controlled wireless switches (used as a second / third / etc. switch).
  • Remote ON / OFF – Anytime, anywhere, from now on you can turn all lights on and off remotely
  • eWeLink 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 timer functions: single time, scheduled turn on/off, countdown/timer.
  • Share control – Control the device together with your family
  • Group control – You may group similar type of devices to turn ON / OFF multiple devices with one tap in the app
  • Smart scene – Triggered on/off by temperature, humudity, motion or other sensors, or trigger by other switches
  • Compatibility - Works perfectly with Amazon Alexa, Google Assistant, IFTTT and Google Nest
  • With live-only wiring: recommended only for switching lights! Compatible lights include: tungsten, LED and CFL lamps.
  • Maximum load
    • Min. load: 3W for incadescent lights: 3 W; max. load for incadescent lights: 300W
    • Min. load: 3W for LED lights: 3W; max. load for LED lights: 100W

Product type:
4-gang smart wall switch
black, 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, 4 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 features
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
141 g/pcs
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SmartWise T4 EU 4C UNI (R3), black, 4-gang, WiFi+RF smart light switch (works with single-live-wire, and with live+neutral wiring)
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