... home electric appliances control use This is 1 channel wireless transmitter Technical specification: Battery: 27A 12V Channel: 1CHWe can design/ ... Jumper is OFFpossition, when press button A on the transmitter, receiver channel A goes on 2 secondsthen goes off automaticaly...Same ... 3):Commutative lock model:[For example 4ch wireless switch] Press remote button A,the receiver relay A is ON,the relay ...