After the first marten damage we discovered after the usual Internet search this device. We also wanted a stand-alone unit with no connection to the vehicle battery. So equipment ordered. Installation can be managed relatively unproblematic. The contact plates to the cooling tubes, or anything made of rubber is attached. Then put device into operation, works! But, always look for a service life of the car, so about 2-3days is the vehicle battery as far down (partly 8V) that the car will not start. The first time the car was only half a year old, a new battery has been installed as a goodwill gesture from the car dealership. Then it happened again, do not drive 2-3days and the same game. Then we multiply disabled the Marder Schreck, according 8Tagen the car started without any problems, voltage was 12V. Marder Schreck off Wednesday night parked car Friday morning would not start again. Now that we have made the game several times with and without Marder Schreck and the car with deactivated Marder Schreck behaves quite normally, we have the producer / sales contact. Unfortunately, the Lord was very dismissive. Was not to be expected, his statement because there is no link at all. Only that we have made the game now often enough and know there is a connection. Maybe someone has already made other similar experiences. Pity, because otherwise the product would certainly be effective. Maybe it's also the name, in our wars more stop than go ...........