1 Channel 5V 9V 12V 24V Relay Module Board Shield With Optocoupler 12V Relay Module Support High and Low Level Trigger Describe: 1. The module uses genuine quality relay normally open interface Maximum load: AC 250V/10A, DC 30V/10A; 2. Adopt SMD optocoupler isolation, strong driving ability and stable performance; trigger current 5mA; 3. The working voltage of the module is 5V/9V/12V/24V; 4. The module can be set to trigger high or low by jumper; 5. Fault-tolerant design, even if the control line is broken, the relay will not operate; 6. Power indicator (green), relay status indicator (red) 7. Humanized interface design, all interfaces can be directly connected to terminal leads, which is very convenient 8. Module size: 50*26mm*18.5mm (L*W*H) Module Interface: 1.DC+: Positive power supply (VCC) 2.DC-: Negative power supply (GND) Relay Output: 1.NO: relay normally open interface 2.COM: Common Interface Relay 3.NC: relay normally closed interface High and Low Level Trigger Options: It is low-level triggered when the jumper is connected to the low pin It is HIGH triggered when the jumper is connected to the HIGH pin Package Included: 1*Relay module