1. Extremely smooth knob touch screen: precise control, fingertip , smooth rotation, smooth as water 2. 3-way relay and 4-way custom switch: efficient control of three-way relay and four-way physical button 3. Built-in tomato alarm clock: countdown reminder to meet daily timing needs 4. Add device scene control: integrate smart devices into the central control for convenient management 5. Equipped with a smart IOT chip: using a high-performance real-time to fast and stable device response Input: 100-240 VAC, 50/60 Hz Wireless protocols: Wi-Fi, Bluetooth Operating temperature: 0-40 Operating humidity: 5%-90%RH (non-condensing) Dimensions: 86x86x11.5 mm (panel) Dimensions: 86x86x51.4 mm (with base) Screen size: 1.6 inches Resolution: 400x400 Note: It needs to be used with a gateway, which needs to be purchased by yourself. 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: 1 * Knob Central Control Screen 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.