About This WIFI RF Bluetooth 220V Smart clean contact Relay,Smart life tuya app wifi remote & 433Mhz RF Wireless remote .Easy to configure to Smart life app,working voltage is DC 5V or AC 85-250V.It's clean contact passive output,input voltage just powe the relay,without current pass through the board,no voltage at output,just on/off signal Widely Usage,MHCOZY 4 channel WIFI Relay,with 3 working mode,self-lock ,emulate Momentary(inching) and Interlock mode,you can set mode as channel,adjust inching time from 1 second to 1 hour in Smart life app.DIY WIFI Garage Door Opener,Automate chicken hoop door shutter blind curtain Easy to setup ,add Smart WIFI control to your home,support 2.4G wifi only,once powered on,your phone bluetooth will find it asap,tap to configure with Smart life app,programe or remove fixed 433Mhz RF(not included) in by pressing button on board Schedule Timing function and share control,create schedule smart scenes,support countdown/sunrise/sunset/loop timer,happy share control with family Voice control,work with alexa assistant Nest smartThings,create run to tap to work with Siri in tuya app,use your voice command control when busy Overview Connector Type : Usb Contact Material : Silver Contact Type : Normally Open Current Rating : 10 Amps Mounting Type : DIN Rail Mount