10pcs 1-channel relay module board with high or low level trigger and optocoupler isolation support, DC 5V

Fault-tolerant design: Fault-tolerant design; even if the control line is broken, the relay will not operate. All relay interfaces can be wired directly through the terminals, normally open and normally closed.
Optocoupler isolation: The 1-channel relay board uses optocoupler isolation, which has strong driving capability and stable performance. The isolation circuit prevents damage to the input/output port from the relay switching current.
Jumper design: The relay module has a jumper that you can adjust to change the unit's state. with a high or low signal. Has screw terminals for the relay (NC, C, NO) and for the input; Coil +, Coil - and Trigger.
Wide application: DC 5V - DC 12V relay module works well with ARM/PIC/AVR/MCU/Raspberry/CNC machine/PS4 etc.

12V Relay Module: Working Voltage: DC 12V; Maximum Load: AC 250V/10A, DC 30V/10A; Opto-Isolator Trigger Current: 5mA
5V Relay Module: Working Voltage: DC 5V; Maximum Load: AC 250V/10A, DC 30V/10A; Opto-Isolator Trigger Current: 5mA