Owfeel 2PCS DC 12V Wireless 2 Channel Relay Remote Control Switch Kit Transmitter Black 433MHz, 2 Channel Relay. Transmitting diatance is about 100meters, without obstacle condition. Ideal for remote control the doors, gates, windows and lighting control etc. Working Current: 10A@12V; Working voltage: 12V (1PC A27 battery), Received Frequency: 315W; Radiant Power: 10mw@12V;Receiving Sensitivity: -100db. Utilize wireless encoder technology, no disturbance or direction restriction.