The 54 GPS Tracker from LandAirSea Systems is a compact GPS tracker suitable for vehicle, people, and asset tracking. A built-in magnet enables the tracker to be placed on magnetic surfaces like those on a vehicle's body. This tracker provides 4G LTE coverage across the US. An AT&T SIM card is included. Real-time location updates can be viewed from computers using web-based software or via the SilverCloud app for iOS and Android. The 54 is accurate to within six feet and will send you an alert if it has left a designated geofence.