Each relay control has its own red indicator LED. The green LED indicates the VCC supply voltage status. The control transistor (PNP) has a 1 kΩ base resistor. Relays rated 10A. The coil operating voltage of the relays is 5VDC. Control is done by connecting the INx pin to the GND pin. The relay changes state and the respective relay's red LED lights. About 4mA flows through the pin at that time.

Note! Not for professional use. Do not use to control mains-voltage equipment. Only for voltages below 50VAC/DC.