Description: With output signal indication; Can directly connect to the MCU output port; Strong anti-interference ability, with photoelectric isolation; With diode freewheeling protection; The response time is less than 20ms; The relay has a long life and can be continuously sucked 100,000 times; The external connection adopts the rotary crimping terminal to make the wiring more firm; There are fixed mounting holes around; Can be controlled by four relays at the same time; Optocoupler isolation, input and output power supply can be independently controlled. Specification: Size(L x W x H): Approx. 70mm x 70mm x 20mm. Power supply: 3V Can control 10A 250VAC, 10A 30VDC load. Package Includes: 1 Piece 4-Channel Relay Module