Feature: 1. A ZigBee gateway is required for using this ZigBee smart knob. Compatible with ZigBee 3.0 version. 2. Customize button actions. Trigger routines to occur, like single press/ double press/ long press/ rotate/ press and rotate. 3. Compatible with APP, control lights, electronics, and small appliances anywhere, create scene linkage, DIY home automation. 4. CR2032 cell powered, ultra-low consumption, strong endurance. 5. Mini and lightweight, no tool required, easy self-adhesive installation. Specification: Using this ZigBee 3.0 smart knob to setup your smart home. It's compatible with APP, can easily control lights, curtains, electronics, and small appliances via different button actions. A must have for your smart home Features: A ZigBee gateway is required for using this ZigBee smart knob. Compatible with ZigBee 3.0 version. Customize button actions. Trigger routines to occur, like single press/ double press/ long press/ rotate/ press and rotate. Compatible with APP, control lights, electronics, and small appliances anywhere, create scene linkage, DIY home automation. CR2032 cell powered, ultra-low consumption, strong endurance. Mini and lightweight, no tool required, easy self-adhesive installation. Note:Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black Material: ABS Communication: ZigBee 3.0 Working Range: 50m Open Area Working Humidity: -10~45℃ Built-in Battery: 3V CR2032 Item Size: 40 * 26.5mm / 1.57 * 1.04in (Dia. * H) Package Size: 5 * 5 * 4cm / 1.97 * 1.97 * 1.57in Package Weight: 33g / 1.16oz Package List: 1 * ZigBee Smart Knob Package List: 1 * ZigBee Smart Knob