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: BlackMaterial: ABSCommunication: ZigBee 3.0Working Range: 50m Open AreaWorking Humidity: -10~45Built-in Battery: 3V CR2032Item Size: 40 * 26.5mm / 1.57 * 1.04in (Dia. * H)Package Size: 5 * 5 * 4cm / 1.97 * 1.97 * 1.57inPackage Weight: 33g / 1.16ozPackage List:1 * ZigBee Smart KnobPackage List:1 * ZigBee Smart Knob