Further to my comments Review by Norma Parks
Further to my comments about the early ineffectiveness of the Catwatch deterrent, I need to retract my negative opinion! The deterrent was replaced by Concept Research without any difficulty and has been in constant use for five months now. Eventually my garden has become cat-free. Concept Research give a lot of information about using the deterrent on:
http://www.conceptresearch.co.uk/catwatch-the-cat-deterrent-keep-cats-away
CATwatch - the RSPB approved ultrasonic cat deterrent to keep cats away from the garden.
As described by the manufacturers, it does take time for cats to react and move elsewhere. For anyone thinking of buying a Catwatch deterrent read the information and have patience. (Posted on 21/10/2016)