Features: *It can replace remote controller to control all SONOFF products with 433Mhz RF remote control function, such as T1 UK, T1 US, T1 EU, Slampher, Sonoff RF, Sonoff 4CH Pro. *Mechanical Life 100,000 times of operation. Excellent quality with long lifespan. Upgrade your home to an elegant smart home, control anywhere, anytime! *You can stick or screw it to your original 86 box on the wall or near staircase, bedside or doorway. *Attached with alkaline battery inside, provide with stable and powerful power supply. *With dual adhesive tape, can be installed anywhere you like. Easy installation and use.