... : 7ASize 49 * 69 * 20MMUSER MANUAL KL-K400C 4 Channel Remote Control Switch With Remote Control 1. ProgrammingPress learning key for 3s, the indicator light flashes ... function:(When jumper is off position) press A on the transmitter, receiver A goes on 2 seconds, then goes off automatically, same of B ... A, the receiver relay A is on, the relay B/C/D is off.Press remote button B, the receiver relay B ...