Owfeel RF 12V Two Transmitters 4X 1 Channel Relays Smart Wireless Remote Control Switch White & Grey Transmitter 1.One channel of output, the output can be independent, but also inching and interlocked 2.Can switch the working mode between inching, self-locking and interlocked 3.Wireless Coding Technology, No Direction, Switch Without Disturbing Each Other. 4.Can control electrical equipment of more than 1000W 5.Suitable for Remote control of the on and off of pump, machine-tool, LED lights and other Civil and industrial supporting remote areas.