5Pcs Bestep 2 Channel 3V Relay Module Low Level Trigger Optocoupler Isolation For Auduino 300028162644

5Pcs Bestep 2 Channel 3V Relay Module Low Level Trigger Optocoupler Isolation For Auduino 300028162644

Module parameters: 1. Size: 50.5 x 38.5 x 18.5mm (length x width x height) 2. Weight: 31g 3. PCB color: Black 4. There are 4 fixing screw holes...

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