Satellite Surveillance GPS Tracking Device for Volkswagen Beetle BINOMIAL GPS TRACKING: Designed to be used in conjunction with cell towers and GPS satellites, to triangulate positions within 10 feet 98.25% of the time. Commercial grade accuracy offered to the consumer market. The iTrack uses up to 62 satellite channels. MULTIPLE TRACKING METHODS: You have the option of setting your iTrack to report its location as often as every 10 seconds or every 4 hours  it depends on how often you want the iTrack to report its precise location. You can also use the On Demand tracking feature  the iTrack only reports its location when prompted  to extend battery life. MOTION ACTIVATED: The iTrack can be programmed to start reporting down to every 10 seconds while in motion. This feature is extremely useful if you own a fleet of plumbers vans or if you just want to know where Timmy is going with your car. The iTrack will automatically return to Hibernate mode when not in motion. PROTECTION: No GPS unit would be complete without a waterproof case and a way to mount it, thats why the iTrack system includes a water-tight case and a magnetic mount for external vehicle caching.