Emprum UltiMate GPS Receiver for iPod touch, iPhone, iPad and desktop/laptop computers Use it in your car, on your bike, on your boat or in a plane. Use it for geocaching, hiking, golfing, cycling, running, or any other outdoor activity you can think of. Works great with apps like Navigon, TomTom, RunKeeper, Geocaching, Fore Flight, ESRI ArcPad, and many, many more. Turns any iPod touch, iPhone, iPad or PC (Mac/Windows/Linux) into a state-of-the-art GPS receiver. High quality product, designed and assembled in the USA! "Made for iPod" certified by Apple. No need to "jailbreak" your iOS device. Comes with the free UltiMate GPS App, available on the App Store (requires iOS 3.0 or higher), giving you full control of your receiver. Works with most, if not all, location-based iOS apps available on the App Store. Also works with your PC (Mac/Windows/Linux), delivering standard GPS NMEA sentences over USB to your PC for use in navigation or location-based PC software (not included). Powered directly from iPod touch, iPhone or iPad, or via USB cable from PC or wall/car charger. Includes 1.2m (4ft) USB cable with quick-release button and 2.1A charging capability. USB cable allows for on-the-go charging and syncing of iPod touch, iPhone and iPad. WHEN USB CABLE IS PLUGGED IN, GPS ENGINE WILL KEEP A SATELLITE LOCK, EVEN WHEN SWITCHING APPS! Small and portable with a high-quality glossy black finish. Works with most protective cases, vehicle mounts and other fixtures. Only receiver on the market that provides real 5Hz update rate for iOS apps. AGPS and DGPS enabled. Accuracy: 2.5m, max altitude: 18000m, max velocity: 515m/s, max acceleration: 4G. Two bi-color LED status indicators (customizable for night viewing). Fast GPS lock times: : 1sec (hot start), 30secs (warm start), 35secs (cold start, 15secs with AGPS data uploaded).