Product Features:  1. New idea for 2/3 Way circuit (two switches control one light) that is explained as multi-control association of this switch to other WiFi smart switches in App;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.)  2. 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,voice control and built-in RF433 frequency allows for another control via RF remote control switch with encoding 1527 without interference; achieve multi-control by associating to other smart switches.(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 free voice control ;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. Neutral wire is required in your switch boxes to operate correctly;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 .    Function Upgraded:  Update1: Multi-control in a much easier way.  Update2: New pairing mode with WiFi+Bluetooth.  Update3: Backlight ON/OFF optional.  Update4: Relay status adjustable when power off.    Parameter:  Working voltage: AC100-250V, 50/60Hz;  Current type:Total 10A;  Rated load: 2200W/1Gang;  Wireless type: Wi-Fi 2.4GHz;  Power consumption: Less than or equal to 0.5W;  Working temperature: 0℃~40℃;  Support system:AndroidiOS;  RF Frequency: 433MHz;  RF Standard Code: 1527;    Package included:  1 x Smart switch