This Tuya ZigBee smart knob switch is designed for flexible and intelligent home control. As a wireless scene switch, it lets you quickly trigger customized scenes and device combinations with a simple turn or press, without complex wiring.The product not include CR2032,battery needs to be purchased separately. Use the multi-function knob to control lights, dimming, curtains, and other smart devices. Different rotating directions, press, and long-press actions can be set to trigger different scenes such as movie mode, reading mode, or night mode for convenient one-key control. The controller is battery powered, eliminating the need for neutral wire or additional power supply. Compact and lightweight, it can be placed on a table, stuck on a wall, or carried in hand. Ideal for renters or anyone who wants a non-destructive installation. Create rich automation scenarios in the app: link the knob with smart bulbs, switches, plugs, curtains, and sensors. Automatically adjust brightness, color temperature, or turn on/off multiple devices at once to match your daily habits, improving comfort and energy efficiency. Compatible with the Smart Life and Tuya smart apps. Easily add the device via a ZigBee gateway, then configure functions, scenes, and automations. Support for remote control, timer, schedule, and one-tap scene activation from your smartphone. Color: Black Material: plastic Package Contents: 1*Wireless Scene Switch Only the above package content, other products are not included. Note: Light reflection 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.