"Overview: The 2CH T433 86 type 2CH wireless 433MHz RF remote control transmitter with adhesive wall plate can support all SONOFF products with 433MHz RF function. After learning the codes with the 433MHz RF remote control, you can turn on/off the touch switch inside. It can make your life smarter and more convenient! Features: * 2CH can control 2 different devices. Supports all SONOFF products with 433MHz RF remote control function, such as T1 UK, T1 US, T1 EU, Slampher, Sonoff RF, Sonoff 4CH Pro. *You can stick or screw it on your wall or near a staircase, bed or door. * With sensitive touch screen made of luxurious glass panel, ON/OFF can be operated by touch. Upgrade your house to make it a stylish and elegant home. Control it anywhere, anytime! can be installed in any place. Easy to install and use. Features: Power Supply: 1 12V 27A Alkaline Battery (Included) Usage: Stairwell / Bedside / Doorway, etc. Product Size: Approx. 86 * 86 * 14 (mm) Product Weight: Approx. 103g Package