ITEM NAME:2CH 12V Relay Module with Optocoupler Insulating LED Light PLC Control A#S Product Description Description: Features: With optocoupler insulating and PLC control. Controls AC 250V 10A, DC 30V 10A. Triode driver. With holder screw holes for easy installation. Small PCB Board: 53 X 40 X 18 mm/2.09 X 1.57 X 0.71 in With red indicator light. Low/High level trigger. Ports: Left: JD-VC: Relay power port VCC: Module power port GND: Connect ground cord Right: VCC: 12V module power GND: Connect ground cord 1N1-1N82: Relay control port Included: 1 X Relay Module Extension Board.Low/High level trigger. Included:1 X Relay Module Extension Board. JD-VC: Relay power port. VCC: 12V module power. VCC: Module power port. With red indicator light. GND: Connect ground cord. Small PCB Board: 53 X 40 X 18 mm/2.09 X 1.57 X 0.71 in.