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Specification: Voltage range : 90-250v AC(50/60Hz) Max current : 10A/gang Max Power : 2200W/gang Wireless Frequency : WiFi 2.4GHz,RF 433MHZ Operating Temperature(recommended) : 0ºC-40ºC(32°F-104°F) Operating Humidity: 5%-90%RH, Non-condensing Size: as shonw 144mm x 90mm x 40mm (approx.) Package Includes:1 x 4-CH WiFi Switch 1*universal 433Mhz RF remote 1*English Instruction Features: The 4CH WIFI RF Smart Switch with 4channel design,can control 4 lights at the same time.help to make your home smartsupport ewelink app control, RF control and Voice control Sync Status-Real-time device status provided to App Share Control-Control your smart home together with your family Timing-Set scheduled/countdown timers to turn on/off at specified time Scene-Turn on/off a gang of devices with one tap Smart Scene-Trigger on/off by temperature, humidity or other environmental conditions Network Support -Control electronic devices over Wi-Fi or 2/3/4G mobile network Voice Control -Works with Amazon Alexa, Google Home IFTTT NestSupports setting power on state,rename each channel