AC 110V 120V 220V Wireless RF Remote Control Relay Switch Universal 2-Ch Receive

RF Frequency: 433.92MHZ. 1x RF Relay Receiver. Press and hold button “A”, relay “1” will turn on; Release button “A”, this relay “1” will turn off. Toggle mode. The device has decent transmission distance and is quite flexible in functionality ,Signal stability ,Max range is up to 164ft/50m with no obstacle.