Description: 1.Multi-gang Smart Dimmer Switch with 1/2/3 Gang Optional:Newly designed as 1/2/3 Gang dimmer functional to adjust the brightness of your light with one button for extremely simple operation,easily long pressing the button for dimming;A really good substitute for a single switch with additional dimming function. 2.Compatible with Tuya Smart/Smart Life App under Tuya ZigBee Gateway:A Tuya ZigBee gateway is a must for this ZigBee dimmer switch;Smartly control your connected lights via smart phones by Smart Life App under the ZigBee hub with main power to control all or individual power switch for each to control independently;Each works without any interference for maximum convenience. 3.Work with Alexa and Google Home for hands-free voice control with 0%-100% dimmable for each single button; can also be controlled via Smart Life/Tuya app anytime, anywhere; setting power on status and switch backlight in Smart Life App for real-sense intelligence. 4.Take full control of connected appliances with schedules and countdown (1/5/30 mins, 1 hour, etc.) with the app; share control with family and friends for added convenience 5.Neutral wire is required in your switch boxes to operate correctly; only supports 2.4 GHz network. Specifications: Model: ZS-EU(US)D Working Voltage: 90-250V AC 50/60Hz Max. Load: K1,K2,K3