I have had my PetTracer collar for a couple of years now, this has been such a godsend as I worry about my pets and these do give you the peace of mind that you know they're not far from home. We recently adopted an additional cat, after the usual keeping him in we did let him out with his collar on, and it avoided the worry of him getting lost. If you're thinking about purchasing this collar I would highly recommend using this company. If you have any questions or help regarding your subscription the support team are so so helpful and will respond back to you very quickly. Highly highly recommended.