FREE POST - With 2 big improvements over the old X9... The X9i now has a USB interface (the old X9 was serial) The new X9i is compatible with mapping software. Suunto X9i, the World's Smallest Outdoor Wristop Computer with GPS Utilizing digital mapping software, users are not only able to plan their routes on a digital map, but can also print their own customized maps and download routes from the software directly onto the Suunto X9i. In this way, route planning and waypoint programming is fast, accurate and simple. When navigating on a pre-planned route, the Suunto X9i shows the direction and remaining distance to the next waypoint and calculates the estimated time of arrival. During activities, the Suunto X9i shows the current speed and distance traveled using GPS functions. The 'Find home' setting guides the way back to the start point or marked 'Home' position whilst the 'Track back' function guides the user back along any recorded route. The Suunto X9i is the world's smallest and lightest wrist-mounted GPS unit. In addition, it incorporates an altimeter, barometer, digital compass, thermometer, and an extensive memory, as well as the usual time/stopwatch functions. Combining all of these functions into a sleek, sporty wristop computer not only enhances safety, but also adds a whole new dimension to the outdoor experience. Suunto is the leading manufacturer of sports instruments for a variety of sports, including training, golf, skiing, hiking, diving and sailing. The company's focus is on sports activities where advanced measurement technology and data processing can generate significant performance benefits for active people. On full charge the GPS will function for 12 hours constantly, the GPS can be set to check position every "X" minutes - on a sample rate of every 10 minutes the battery will last for a week.