1.Working voltage: DC12V 2.Operating frequency: 315-433MHZ 3.Receiver sensitivity:-103DB User manualThis is the 4-way ... jumper is off position) press A on the transmitter, receiver A goes on 2seconds,then goes off automatically.same ... C/D.3) interlock modelPress remote button A, the receiver relay A is on, the relay B/C/D ... A/B/D is offPress remote button D, the receiver relay D is on, the relay A/B/C ...