We have purchased a Waterproof tracker for a neighbour with dementia who we are caring for. The tracker has been invaluable for our peace of mind, to know where he is and enabled us (and the police) to pick him up when he has wanderered out and become lost. Sometimes there seems to be a glitch with the gps in that it shows him being out when he has returned but we have been able to understand that because it's not showing him walking around. Customer service has been excellent, replies to emails within hours. A wonderful device, we are so glad we bought it. Thank you