... : [For example 4ch wireless switch]Press remoter button A first time,the receiver relay is ON, ... Extend function:When Jumper is OFFpossition, when press button A on the transmitter, receiver channel A goes ... wireless switch]Press remoter button A always,the receiver relay is ON,release button A,the receiver relayis ... :[For example 4ch wireless switch] Press remote button A,the receiver relay A is ON,the ...