The Globalsat GH-625, is a fully sealed, waterproof watch and GPS. The GPS uses the excellent SiRF Star III chipset which should provide a good signal as this thing bounces around on your wrist. The firmware can track 20 satellites, store 100 waypoints, it includes a “breadcrumb” style waypoint-based route tracker and can export data for use on Google Earth. It has a backlit LCD, the battery lasts about 21 hours with just the GPS on, and unlike you it works from -10°C to 60°C. Charges via mini USB in about 3 hours. There’s also the GH-625M version which includes a heartrate monitor.
Globalsat GH-625 series provide fully-sealed, waterproof and large LCD wrist-watch 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 etc. And it can be also used as GPS receiver by USB interface.