"de_ja" wrote in message
...
Hi,

I want to know if such devices as sonic repellers to deter mice and
rats and other rodents are actually effective.

For example the B&Q Rat & Mouse Repeller at

http://tinyurl.com/5a589b

Does anyone have any first hand experience of these devices, do they
really work?

Thanks very much for your opinions.

From what I've read, nobody has ever demonstrated in a proper study that
these things work.