SMATRUL WHK-S2 WiFi Push Button Light Switch Wireless RF 433Mhz Wall Relay Timer for Amazon Alexa Google Home - Black 433MHZ RF function + WIFI function 2 in 1, smarter and more user-friendly 100m long-distance signal, suitable for open areas, the scope of use in non-open areas will be reduced 3 kinds of restart state, don't worry about the light still on when you go out Voice control, works perfectly with Amazon Alexa, Google Home, etc Turn off the lights after leaving, save energy Timing function, turn on the lights regularly Countdown function, set the light off time freely Fix with double-sided tape, feel free to paste Fluorescence strip design, you can find the switch at night Specifications: Remote control remote distance: up to 100m (theoretical distance) Controller working voltage: AC 90V -250V 110V 220V 60HZ / 50HZ Controller working frequency: 433.92MHZ + 2.4GHz WiFi Controller WIFI standard: IEEE 802.11 b/g/n Controller operating temperature: -10 to + 70 Controller size: 83 * 42.3 * 25mm Support system: Android / IOS Support application: Tuya or Smart Life Voice Control: Google Home, Amazon 1 x 2-Gang Wireless Switch 2 x Controllers 1 x English and Chinese User Manual Other items not include