As far as everything is OK with the device. Only I liked the installation of the ST 50 better. There, the device was secured from the inside with 2 screws, so it could not be stolen. In the current installation, it is screwed from the outside with 4 screws and hidden under a frame, not theft-proof !!!! Also, I found it an impudence that was not a 12 volt connection cable in the delivery. It was also not mentioned in the description. I then simply cut through the connection cable to other devices and connected 12 volt minus to the shield and 12 volt plus to the red cable. It works !!!!