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There are two parts of the sensor, the transmitter has red and black cables. Black cable is -5V. The red wire is + 5V. Yellow cable is signal cable.
You can use this product as a product line or as a burglar alarm system.
Features:
Voltage: 5V
Current: 5mA
Distance: 0 ~ 300mm
Weight: 6g
Time to reply: 1ms