Easy Setup Waterproof GSM GPS Puppy Tracking Device USB Rechargeable GSM Technology: Connect your PeTrack to the app on your smartphone using a convenient prepaid SIM card. Plus, built-in GSM technology narrows down its location to an area of a few miles, which is handy if Nipper gives you the slip where theres a gap in satellite coverage. If Nip has a few hiding spots or buddies across town, GSM can guide you towards the best place to start. Detailed Information At Hand: The PeTrack can deliver its location, battery level, time, date, and address on demand. Just open the app and send a request: its that easy. And once you clip the PeTrack to Maxs collar, theres almost no maintenance. Just charge it when it gets low, then clip it back on. Long Lasting Battery: The rechargeable lithium-polymer battery gives the PeTrack a full week of power with GPS enabled. In standby mode, it lasts 30 days. Just one charge a week (maybe during bath time) and the nagging concern of your pets safety is relieved. The PeTrack even reminds you when its getting low on power. Find Out What Fidos Been Up To: Not only can the PeTrack deliver real-time location data, it can also tell you everywhere Fido went along the way. History Mode helps you get a good idea of Fidos habits and favorite spots, allowing you to anticipate his moves in the future. Motion Detection: The PeTrack uses an internal balance ball to determine motion, and enables location tracking upon sensing little Gizmos movement. After remaining still for more than 3 minutes, it powers down to save energy. While Gizmo sleeps, the PeTrack is conserving energy.