Despite the many negative reviews I bought the device in the hope perhaps to be among the lucky ones who get a fully functional device. Unfortunately I was wrong. After faster delivery through Amazon scanning will ran through and then - nothing. No automatic display of the first transmitter as described in the operating instructions. Even after repeated Neueinschalten and boats - nothing. I had to return the equipment. The unit may well be ok. But you have to get a functioning. I am a long time satisfied customer of Amazon and had never broken deliveries. Now I am very disappointed for the first time. I do not understand that manufacturers that are obtained frequently negative reviews and often returned still remain in the range. Reads because Amazon no customer reviews?