Terrible. The device worked once set up for 2 hours, after this it completely lost gps and wouldn’t even connect to the mobile network let alone the gps! When it did work gps was well out - my partner took the collar out to check prior to putting it on the cat. It showed the collar was ‘outside the geofence’ which it wasn’t anywhere near! This lead to false panic a fair few times!! Emailed the company and it took about 9days after them receiving the item back before they decided to refund it. Complete joke - useless, the cats are now out without it and I have less worry as I am not constantly told they are on a main road when this is not the case. AVOID.