The unit I had bought before some time ago in order to drive the marten from the car, which is also managed. Now I wanted to use a new device at another location. Unfortunately, the first delivery was the same defective upon receipt. The replaced equipment was, however, after about 1 month on the mind. Diagnosing PEARL: defect in the cable; Replacing the cable and back to me. Now it works again. I forgive the low rating because I am unhappy with the "quality" due to my experience. Too bad.