Relay Module 12 Volt 2 Channel 12v with optocoupler for arduino

#157 1. Size: 50.5mm (length) * 38.5mm (W) * 18.5 (H) 2. Weight: 31g 3.PCB Color: Black 4. board four weeks with four fixed screw holes, hole diameter 3.1mm, easy to install and fixed 5. Relay selection of quality loose music relay, SPDT. A common terminal, a normally open, a normally closed terminal 6. optocoupler isolation, good anti-jamming 7. pull low, high release. Energisation status indicator light, the release status LED is off 8.VCC system power, JD_VCC relay power. It can plug in jumper Electrical parameters: Supply voltage: 12V DC Current: More than 100mA load: 250V 10A AC or DC 30V 10A Wiring instructions: VCC: positive power supply system GND: negative power supply system IN1 - IN2: Relay control port (Do not reversed, we do not cause the module to burn to be returned.)