... ,5ch,6ch,7ch,8ch,9ch,10ch,11ch,12ch,13ch,14ch and 15ch wireless remote control switch,AC90v~AC270v or DC6v~12v ... :When Jumper is OFFpossition, when press button A on the transmitter, receiver channel A goes on 2 secondsthen goes off automaticaly...Same ... button A,the receiver relayis OFF,the same as B/C/D. Use field: Electric motor rotation positive and negative wireless control ...