On 23/05/2018 18:22, Theo wrote:
David wrote:
I have a wireless battery powered camera on the back of my caravan.

The signal is not 100% and as far as I can tell it relies on reflections
to get from the back of the caravan to the front of the car (just guessing
why it sometimes drops out, behaviour strongly influenced by the angle of
the aerial and direction).

What frequency does the camera use?

2.4GHz.

Bill