1-Channel 433MHz WiFi and RF Relay Switch: Add WiFi and 433MHz remote control to your garage door opener. It can be paired with RF as a channel, making it convenient for children and the elderly. With a built-in 433MHz RF receiver, it supports RF 433MHz station learning (433MHz remote control included). Wide Compatibility: Works with the Tuya Smart Life app, the eWeLink app, Philips Hue Bridge, Alexa, SmartThings Hub, Echo Plus 2nd Generation (L9D29R), Echo Plus (ZE39KL), Echo Show 2nd Generation (DW84JL), and Echo Studio. No third-party app required, simply plug it in and say, "Alexa, discover devices." ZigBee 3.0 protocol, one-touch pairing: With the ZigBee 3.0 protocol, you can quickly add it to SONOFF ZBBridge or Tuya Zigbee gateways and pair it with a single tap in the app. Three operating modes: Can be used for DIY garage door openers and other household appliances. Operating voltage: USB 5V or AC/DC 7-32V. Works as a wireless switch in self-locking mode, as a smart button in