4 Channel Low Level Relay Module Without light coupling 5V

Functions:

Module uses Songle relay control, AC voltage maximum 250 V,
alternating current maximum 10A, direct current maximum 30v, direct current maximum 10A;
Driven 8550 triode, driving skills are strong;
Working voltage 5v, 5v input the Vcc pin
It has a fixed bolt hole for easy installation
PCB board dimensions: 7.4 * 4.4 (cm)
The power indicator light (green), the eight channel relay status indicator light (red)

Instructions:

1 VCC and external 5v
2 GND external GND
3 1N1-1N4 exchange relay control interface via IO port of the microcontroller