1. Wireless remote control of your smart home: create a variety of smart scenes and link with any of your favorite tuya smart devices 2. Simplify your day with tuya smart scenes: create smart scenes in the tuya smart app to trigger routines 3. Unlock smart ZigBee bulb control through remote mode: intelligently control ZigBee bulbs in remote mode 4. Switch options in the app: select knobs and knob switches in the app for various scenes 5. Simplified smart control: scene mode and remote mode Buttons: 1 button Operating voltage: DC 3V Wireless protocol: Zigbee 3.0 Wireless distance 100 meters (open space) Indicator: 1 Standby current: ≤10uA Battery type: CR2450 (battery not included in delivery) Standby time: {}12 months Operating humidity: -10℃-55℃ Operating humidity: 0%-99%RH Note: A ZigBee gateway is required, please purchase separately. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: White Material: ABS Package Contents: 2 x Smart Knob 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.