I bought Rearviw Dash Cam Wide with Parking surveillance kit, and had that installed properly. When I park a car, turn ignition off, it records only movement when I am leaving the car. But when I return back to car, try to initiate some recording (simulating someone hit a bumper on a parking or so) by pushing a car up to the point it swings sideways, it does not trigger video recording. I set up surveillance sensitivity to high, but it does not triggers. But, it DOES record when I leave the car, and it notify me that next time I turn ignition on. That proves that it works, but I don't know why it is not triggered by my simulation - pushing a car? I can tell you that I swing a car pritty much - it swings about 10-15cm sideways when I push it.