1 Channel 433Mhz WIFI and RF Relay Switch: Add wifi and 433mhz remote control to your garage door fireplace, can pair with RF as channel, convenient for kids and old people. With built-in 433Mhz RF receiver, supports RF 433Mhz fixed learning (433Mhz remote control included). Bridge and Alexa and SmartThings Hub and Echo Plus 2nd Generation (L9D29R), Echo Plus (ZE39KL), Echo Show 2nd Generation (DW84JL) and Echo Studio. No third-party app 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 just one click on the app. Three working modes: can be used for opener DIY garage door and other home appliances. Working 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 interlock mode. Timer & Schedule: Set countdown/loop timer schedule for comfortable living and happy sharing. Included: 1 x Zigbee wireless module + 1 x remote control (433 MHz). Note: 1 channel / 2 channel module can compatible with Tuya and ewelink APP. 4 channels cannot compatible with Tuya and ewelink APP at the same time.