4 Pack 12V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger (12V) auspowers_batchsix longer length makes it more

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4 Pack 12V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger (12V) auspowers_batchsix longer length makes it more4 Pack 12V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger (12V) Module description: 1. The module Operating voltage 12V; 2. Fault tolerant design, even if the control line is broken, the relay will not operate; 3. The power indicator (green), the relay status indicator (red); 4. Module size: 50mm26mm18. 5mm (LWH). Interface: InputVCC: Relay power supply +GND: Relay power supply IN: Signal trigger input (High or Low