Specification: 1. Dimensions: 50.5mm * 38.5mm * 18.5mm 2. Weight: 31g 3. PCB color: black 4. board around with four fixed screw holes, hole diameter 3.1mm, easy to install and fixed 5. Relay selection of high-quality loose relay, single-pole double-throw. A common end, a normally open end, a normally closed end 6. Optocoupler isolation, good anti-interference 7. Low level pull-in, high-level release. Pull the status indicator light, release the status indicator is off 8. VCC for the system power, JD_VCC for the relay power. Plug in the jumper cap Electrical parameters: Supply voltage: 5VDC Current: Larger than 100mA Load: 250V 10A or 30V 10A DC Wiring instructions: VCC: The system power is positive GND: Negative pole of the system power supply IN1 - IN2: Relay control port Package Included: 4PCS X 5V 2 Channel Relay Module

High-level triggering refers to a triggering method in which there is a voltage between the signal input terminal and the ground, which can be understood as a short-circuit triggering method between the signal input terminal and the positive pole of VCC. LED light is used to indicate the relay output state; board four weeks with four screw holes, hole diameter 3.1mm, easy to install and fixed. Supply voltage:5VDC Current: Larger than 100mA Load: 250V 10A or 30V 10A DC. Equiped with high-current relay, AC250V 10A ; DC30V 10A. Standard interface that can be controlled directly by microcontroller (Compatible for Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current.