The trailer testing case is used for diagnosing and testing all trailer sockets and plugs (7/13 pin) in passenger cars and trucks. The absolute novelty is the wireless transmission and testing of the vehicle and trailer via radio. Another highlight on the trailer side is that the verification of the connection configuration of the plug side (7/13 pin) is carried out through an automatic testing process. This means that the trailer lighting is automatically activated and retrieved. The power supply is provided by a built-in battery that can be charged via a power adapter. Now with an integrated ABS/EBS function light!.