After a lot of research I have just bought the marvellous little Mini Tracker from TechSilver whose service is second to none. My husband has memory problems so it has reduced my stress levels as the Mini Tracker gives me detailed accurate information on where he is at any given moment whereas previously he was often not where he should be! I have put it on his key ring as he will always have a key with him but it could be attached to a belt etc. He dislikes mobile phones and never uses one so that was not an option for a tracker. I had a little trouble setting it up as I hadn't realised that when I downloaded the app on to my phone I needed to turn on 'mobile data' but when I spoke to Miles at TechSilver he couldn't have been more helpful and patient and said he was more than willing to answer any questions now or in the future, great service. I thoroughly recommend this Company and product.