Bought a cheapo dash cam from Amazon couple of weeks ago, sent it back because it wouldn't record. The vendor offered to replace it and refund postage. O.K. New one arrived plugged it into the car, inserted sd card pressed record button Lo and behold it worked.Recording isn't the best quality but if you shrink the picture down a bit you can read the car in fronts number plate with no effort. For under £20 great value for money.