SONOFF T2EU-RF 86 Type Wall Panel Sticky 433MHz Wireless RF Remote 3 Gang. Does the 433MHz wireless stick-on smart wall switch is the extended new arrival of SONOFF’s best-selling TX series Wi-Fi Wall Smart Switch? No. It continues the similar look with the TX series to keep your home style modern and artistic and is actually a 433MHz remote controller. Does your home be full of hard-to-reach light switches? Or the light switch at the end of a dark corridor is out of convenient reach for the operation of control at night? If that’s true, you need to match a removable remote controller to your lights. The remote controller with 1/2/3-gang works like other regular light switches but adds the ability to control the connected lights from a distance, and is not required to wire, simply stick on it to use. The multiple gangs allow you to realize two remote control solutions, one SONOFF remote controller for controlling multiple lights controlled and multiple SONOFF remote controllers for light control. Plus, the remote controller can be used to connect with SONOFF T1/T2/T3 wall switch to achieve two-way control. It is also used for RFR2, RFR3, 4CHPROR3, and SlampherR2 which provides you one more control way except for APP remote control and voice control. The backlight is designed on the touch button to give you a clear location to control the light at night. The absorbing energy from light decides the brightness of the backlight, the more energy it absorbs, the higher its brightness. Three using methods can be chosen stick-on, screw-on, and desktop.