625 series provides fully-sealed, waterproof, and large LCD wristwatch device, as well as GPS navigation function that locate track point from start to stop It is adopted for people who exercise for broad kinds of outdoor sport, such as jogging, running, biking, snow skating, and more It can be also used as GPS receiver by USB interface Features: Built-in SiRF star III high performance GPS chipset Excellent sensitivity for fixing the position even at a weak signal status With built-in rechargeable and high capacity Li-ion battery Large LCD for easy reading WAAS/ENGOS supported Waterproof and rigid design to avoid damaging because of carelessness Recording all history of self-training by defined day GH-625 can be used as a GPS receiver by easy setup The firmware of the GH-625 series can be upgraded through PC Navigation: Tracking your route as crumb method Marks and saves your tracking points by special algorithm Finds the specified location With heart rate monitor sensor (for 625M model) Supports Google earth file format Embedded high capacity flash memory to store the plenty of data With calorie calculation Track back: gives you a reference route according to your activity before to get better performance of training Application software: Supports the operating system such as Microsoft Windows 98, 2000, and XP Smart training database management and easy to use Easy to use for upgrading the device firmware Uses GS-sport training gym