Model: KR1204B-4 Working Voltage: DC 6-30V Product Type: 4-Channel Remote Control Switch RF Working Mode: ASK Superheterodyne Reception Modulation Mode:ASK Working Mode: Momentary/Toggle/Latched, etc. Matching Mode: Intelligent Learning Code. Quiescent Current:5mA RF Frequency: 433MHz Output Current: less than equal 10A Receiving Sensitivity: 104dbm Wiring instructions: 1, +: Connect to the positive 12V power supply 2. - : Connect to the negative electrode of 12V power supply 3, A: output; normally open end of the relay 4, B: output; relay common; 5, C: output; normally closed relay Colour:black+green Material:ABS Package Contents: 2 x Remote Control 1 x Receiver Module ( Include ) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.