Bell for undemanding

Actually, I read me before buying only negative reviews by, but in this case there was none.
That had to make me aback really. Nevertheless ordered and hoped for the best.
My application:
Mounted transmitter on a stainless steel plate on fence -
- Receiver away about 25m, ca inserted at an angle 90 ° from the transmitter into an electrical outlet
- No reception possible
- Same distance without mounting plate, receiver lößt from
Range of 300 m in the open field I have not tested, but is an unrealistic application.
In addition to the basic function, ringing from lößt, should the ring tone to be more than a clink.
However, the built-in speaker is not more able.
Price / performance ratio was not at all here.