Ultrasonic sensor is for car alarm with ultrasonic sensor slot
three wires connections:
black wire:ground
red wire:12V
blue wire:singal trigger wire
note:
if you buy our ultrasonic sensor ,please check out your car alarm ultrasonic sensor slot,maybe signal trigger way will be different,please adjust wire order among black wire,red wire,blue wire to get alarm trigger signal!
product real photos:
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