Quick Installation explained for Volkswagen Jetta –
Fix the unit inside the Bonnet, visibly outside, SPEAKER FACING UPWARDS to rebound the ultrasonic sound throughout the bonnet area evenly. (Please make sure the speaker is not obstructed and do not hide between any engine area.)
Red Wire has to be connected to Positive Terminal & Black Wire has to be connected to Negative Terminal of the Car Battery (12 Volt battery power is required, you may also draw power from any wire which is passing power)
Please check the unit functionality by pressing “TEST”, you will hear a loud sound.
If your car bonnet lid has heat insulation or heat proof layer (when you open your car bonnet you can see the black layer), face the speaker towards the engine metallic area to re-bounce the ultrasonic sound evenly throughout the engine area.