Features:  Control from anywhere: Instantly turn on/off your appliance with your smart phone or tablet. The free app allows you to add as many Smart Switches as you'd like to keep track of multiple appliances, whenever, wherever.  On/Off any schedule you set: Program your porch light to turn on at sunset, turn the bathroom fan off after selected time, schedule the ceiling fan to be on so you come home to a cool house, or set lights to randomly go on and off for an occupied appearance while you're on vacation.  Voice control your home: Paired with Alexa-related devices, like Echo/Dot/Tap, using the 'Smart Life' skill in Alexa App to control your appliances via a voice commands.  Wifi Remote Control: You can use 'Smart Life' APP in your smart phone to control the wall switch wirelessly with Wi-Fi or 4G network.no hub required.  Timing Function: Take full control of your home or office lights thanks to schedule timer that will allow you to plan the exact time to turn lights and appliances on/off automatically .  Share Device: This samrt light switch can have several control sites shared by different family members.one mobile phone can control many switches also.    Specification:  Working voltage: 100V-240V~, 50Hz/60Hz;  Working current: 2A Max (dimming load);  Wiring mode: zero live wire;  Load type: dimmable lamps within 400W;  Product material: tempered glass panel + fireproof PC shell;  Use environment: temperature 0℃~40℃, relative humidity less than 95%;  Wireless standard: Wi-Fi IEEE802.11 b/g/n 2.4GHz;  Security mechanism: WPA-PSK/WPA2-PSK;  Color: Black, White;  Size: 118mm*72mm*38mm(height * width * thickness).    Package included:  1 x LED Dimmer Switch.    Attention:  This Wi-Fi smart switch must be powerd by both Live and Neutral Line, please cut off the power when installation & un-installtion, operate by professional person.