Package arrived quickly, it was "first class" and appears to be of good quality. The software required some work to work properly. After that he worked on my truck several times. I put it on the roof of my truck for a few months. I used it a few days ago and it doesn't work. I contacted the seller to fix it and they offered to replace it instead. They sent me a new device and a return label. This is excellent customer service and unexpected. Many Thanks.