Features:   1.No neutral wire required;easily installed without rewiring your existing wire with single live wire design;Unique tempered glass panel fits for different kinds of decoration styles and scratch resistance glass panel gives the best look to blend with any wall design.(Attention:A capacitance is a must for normal work that is included in the package.)  2.Differ in features from traditional common switch,this smart switch is able to be controlled by various ways alone without interference with the best value like App control,touch control,voice control and built-in RF433 frequency allows for another control via RF remote control switch with encoding 1527;(Note:433 RF Remote is not included in the package,please purchase separately.)  3. Reinsert new features into upgraded Smart Life Tuya App like ON/OFF relay status as remember last status when power off and backlight switch setting.Compatible with Alexa and Google home allows to freely control your connected devices via voice command; remotely control devices on your smart phone via Smart Life/Tuya App wherever you are.  4. 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 neutral wire required and only for 1 way circuit;only supports 2.4G network;a much easier pairing mode for adding the device with WiFi and Bluetooth connected;includes full 2-year warranty and 60-day refund guarantee for complete satisfaction.  6.Update:  1:New pairing mode with WiFi+Bluetooth,  2:Backlight ON/OFF optional,  3:Relay status adjustable when power off,    Parameter:  Working voltage: 220V AC;  Load Power:3-300W/gang;  Type: 1/2/3 Gang;  (Note:If it is used for LED or energy saving bulb,the power load should be less than 100W);  Wireless type:Wi-Fi 2.4GHz;  RF Frequency: 433MHz;  RF Standard Code: 1527;  Color:White,Black,Gold;    Package included:  1 x WiFi Smart Light Switch