... modelPress remote button A , the receiver relay is on, press button A again the receiver relay is off, the ... :(When jumper is off position) press A on the transmitter, receiver A goes on 2 seconds, then goes off automatically ... the receiver relay A is on, the relay B/C/D is off.Press remote button B, the receiver ... relay B is on, the relay A/C/D is off.Press remote button C, the receiver ...