... 1.Working current : 8mA 2.Working voltage : DC12V 4-channel wireless remote control switch with wireless transmitter KL-K400C ... relay is off, the same as B/C/D.Extend function:(When jumper is off position) press ... , then goes off automatically, same of B/C/D.2) Non lock modelPress remote button A, the ... receiver relay is off, the same as B/C/D.3) Interlock modelPress remote button A, the receiver ...