It depends what kind you want. There are two basic kinds of devices - one, which I used for a while, that allows you to find your cat within a certain radius (and there are various types of these including GPS and all have pros and cons including the fact that the range isn't very large and the signal can be blocked by houses, rain etc) via a handheld device that bleeps when it locates the homing device on your cat's collar, and the other is basically a recording device that you can play back when your cat returns to see where s/he has been.
Claire Moran ● 2269d