Description: TUYA ZigBee gateway is required. 1.Customize/ Button Actions. Smart knob, match the smart scene, open the smart scene with one key. You don't need to click the scene mode on the phone, just click the smart knob to open the smart scene. For example, movie mode: turn on the TV, turn off the lights in the living room, close the curtains, turn on the TV ambient light, and turn on the sound. Click the smart knob to do it. 2. Trigger routines to occur. Five different opening modes of the smart knob. Single Press, Double Press, Long Press, Rotate Press and Rotate. Five scenarios can be set, one to meet multiple needs is indispensable for you! 3.Can control any smart device (Powered by TUYA) Control lights, electronics and small appliances from anywhere. 4. Ultra-low Energy, powered by battery. The battery can be used for a long time, so there is no need to replace the battery frequently. No need to wire in. 5. Without installation.It can also be placed on the table, pasted on the wall, anywhere within reach! Specifications: Product nameSmart Knob BatteryCR2032 3V DC CommunicationZigbee 3.0 Working Range50m Open Area Working Temperature-10C-45C Working Humidity Life Cycle:1 YearsGeneral use) Dimension:40*40*26.5mm Package Included: 1*Smart Knob 1*adhesive 1*instruction Notes: TUYA ZigBee gateway is required.