WIFI and RF 433Mhz relay switch 1 channel: add wifi and 433mhz remote control to your garage door fireplace, can be associated with à RF as channel, convenient for children and elderly people. With built-in 433Mhz RF receiver, supports 433Mhz RF fixed learning (433Mhz remote control included). Wide compatibility : Works with Tuya smart life app and eWelink app and Philips Hue Bridge and Alexa and SmartThings Hub and Echo Plus 2nd Generation (L9D29R), Echo Plus (ZE39KL), Echo Show 2nd Generation (DW84JL) and Echo Studio. No 3rd party apps required, just plug it in and ask “ Alexa, discover devices ». ZigBee3.0 protocol, one-touch pairing: With ZigBee3.0 protocol, you can quickly add it to SONOFF ZBBridge or Tuya Zigbee gateways, pair it with a simple click on the application. Three operating modes: can be used for DIY garage door opener and other home appliances. Operating voltage USB 5V or AC/DC 7-32V, works as a wireless switch in self-locking mode, as a smart button in momentary mode, 2CH and 4CH can work in interlocking mode. Timer and programming: off ;finish the account programming countdown/loop timer for comfortable life and happy sharing. Included: 1 x Zigbee wireless module + 1 x remote control (433 MHz). Note: 1 channel/2 channel module can be compatible with Tuya and ewelink APP. 4 channels cannot be compatible with Tuya and ewelink APP at the same time.