Product Material: Electronic material Size: 50.5mm (length) * 38.5mm (width) * 18.5 (height) Supply voltage: 5VDC Current: more than 100mA Load: 250V 10A AC or 30V 10A DC There are 4 mounting screw holes around the board, the hole diameter is 3.1mm, which is convenient for installation and fixing Squadron selects songle relay, single pole double throw. One common terminal, one normally open terminal, one normally closed terminal Optocoupler isolation, good anti-interference Low level pulls in and high level releases. The status indicator is on when closed and off when released VCC is the system power supply and JD_VCC is the relay power supply. Just plug in the jumper cap Wiring instructions: VCC: system power positive GND: system power negative IN1--IN2: relay control terminal Quantity: 1 piece Package Contents: 1 * 5V8 Relay 1.5V 8 Channel Relay Interface Boardeach requires 100mA driving current; Equipped with high current relay, AC250V 10A ; DC30V 10A 2.Each relay has normally open and normally closed contactCan be selected by jumper relay and TTL or ground. 3.With power indicator8-way road has a status indicator. With a relay coil to house the diode protection. 4.Standard Interface: which can be controlled directly by the microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) 5.The 8 channels are optically isolatedsafe, reliable, anti-interference. Widely used for all MCU control, industrial sectors, PLC control, smart home controlFor a full datasheet for this relay board,