Intended as a replacement for the hand-held transmitter Garagentoranrtiebs

I bought this set plus 2 additional remote controls and power supply is not here at Amazon, but directly from Pollin.
The whole thing should serve as a replacement for the defective remote controls the garage door drive. On this occasion, I wanted to drive with this remote control switch even one more time relay, then the outdoor lighting for a few minutes to turn on.
Installation, connection and commissioning was absolutely no problem with one exception. The gray round button jammed on the remote control supplied with the board after the first pressing. Only by loosening the housing screws to let solve the problem.
The big disappointment came but then the test as far as the coverage would be. If the remote control used in the car, one is already in front of the garage door until the door moves. The range of the device is in my opinion much too low to as "wireless remote control switches" are bezeichtet to. Rather than "radio Nahschalter".
Changing the position of the antenna and carry out also from the case brought no improvement. Also extending the antenna did nothing.