Description:TUYA ZigBee is required.1.Customize/ Button Actions. Smart knob, match the smart scene, open the smart scene with one key. You 't need to click the scene mode on the phone, just click the smart knob to open the smart scene. For example, mode: turn on the TV, turn off the lights in the living room, 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 !3. Can control any smart device (Powered by TUYA) Control lights, electronics and small appliances from anywhere.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.Without installation. It can also be placed on the table, pasted , anywhere within reach!Specifications:Colour: BlackMaterial: ABSProduct name:Smart KnobBattery: CR2032 3V DC (Not Include)Communication:Zigbee 3.0Working Range:50m Open AreaWorking Temperature:-10C-45CWorking Humidity:Less than 90%RHLife :1 Years(General use)Dimension:40 x 40 x 26.5mmPackage Contents:1 x Smart KnobNotes:TUYA ZigBee is required.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.