Really pleased with the Dementia GPS Keyring/Necklace . Really impressed with all the information from the video made things easier to understand. What I like about the Tracker is the two way communication I can have with my partner who has dementia and often goes off for small walks often . I would just say to be careful if you are using silver ring for silver chain on tracker my partner tends to play with things and it must of caught on her jumper and pulled the ring open and tracker fell off . Thankfully we was at home . Would highly recommend TechSilver staff very helpful