Very excellent tracking devices. Put them in your car or motorcycle, even if it goes to the end of the earth, you will know its location. For those who fear their motorcycle or car being stolen, I advise you to get this device, you will thank me. Requires an iPhone for tracking. Works automatically by linking with surrounding iPhones to determine the location. It does not need internet to work, and the battery lasts about a year. There is no limit to its location tracking as long as it interacts with an iPhone that passes near it, it will give you its coordinates. You can use it for: 1- Tracking children 2- Keys 3- Wallets 4- Bags 5- Cars 6- Trucks 7- Drivers