Main Features:  1. New design with neutral wire required and single live wire featured in one switch panel;No neutral wiring required for the single live wire version;Wire the neutral wire on the switch when needed;No capacitor needed for the new update version for better user experience without noise from electric current.  2. New idea for 1/2/3 Way circuit (two switches control one light) that is explained as multi-control association of this switch to other smart switches in App;ON/OFF relay status as remember last status when power off and backlight switch setting in Smart Life App for better sleep at night;capacitive touch control, turn on/off your light with a single touch and scratch resistance glass panel gives the best look to blend with any wall design.(Note:You can multi-control associate of this switch to multiple different switches, but several gangs on one switch is not available, only one gang on one switch can be associated for multi-control.)  3. Differ in features from traditional common switch, this smart switch is able to be controlled by various ways alone with the best value like App control,touch control and voice control; achieve multi-control by associating to other smart switches to get 1/ 2/ 3-way circuit for your house lights.  4. Compatible with Alexa,Google home and Yandex allows free voice control;remotely control devices and intelligent settings allowed on your smart phone via Smart Life/Tuya App wherever you are;Take full control of connected appliances with timers, schedules and countdown (1 /5/30 mins, 1 hour, etc.) with the app; share control with family and friends for added convenience.  5. No more worries about purchasing the wrong version for your house wiring limited; only supports 2.4G network;  Upgraded with More Personalized Points:  Update1: Multi-control association in a much easier way,  Update2: No capacitor featured for the no neutral wire version for better user experience,  Update3: Single live wire/neutral wire required designed as two versions optional for different wiring in one switch,  Update4: Backlight ON/OFF optional,  Update5: Relay status adjustable when power off,  Provide much more convenience and updates for your smart lifestyle with the price unchanged as before.    Parameter:  Working voltage: AC100-250V, 50/60Hz;  Current type:Total 10A;  Inductive load(LED/CFL): 3-120W;  Resistive load(Incandescent): 3-300W for 110V;3-600W for 220V;  Communication protocol: Zigebee protocol;  Wireless type: Wi-Fi 2.4GHz;  Power consumption: ≤0.5W;  Working temperature:0℃~40℃;  Color: Grey;    Package included:  1 x Smart Light (1/2/3 Gang optional)