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4 Ways Relay Module with OptocouplerKey Features
Relay normally open, normally closed.
..
AUD $15.95
8 Channel 5V Relay Shield Module Board Optocoupler module Description:100% Brand..
AUD $17.95
Infrared Slotted Optical Speed Measuring Sensor Optocoupler Module Speed Measuring Sensor Counte..
AUD $11.54