... home electric appliances control use This is 1 channel wireless transmitter Technical specification: Battery: 27A 12V Channel: 1CHWe can design/ ... ,1000m,2000m,10kmWe can design/produce 3 different functional wireless remote control systemindividually or design all the 3 functions ... When Jumper is OFFpossition, when press button A on the transmitter, receiver channel A goes on 2 secondsthen goes off ...