This is the device that uses GPS to track and record everywhere you travel, allowing you to later upload your journey to online mapping applications such as Google Earth. It stores locations in real time on its built-in 64MB flash memory at intervals you determine between one second and 59 minutes, holding up to a total of 260,000 waypoints, including altitude, speed, time, and distance. Small enough to fit in your palm, it can easily store in a pack, purse, or pocket. The included software works on a computer running Windows 7, XP or Vista, allowing you to "geo tag" your trips' photographs with Google Earth. It communicates with Bluetooth-enabled PDAs that have their own mapping software installed. Durable, water-resistant frame enables operation in most climates and weather. Uploads and power are provided by USB; a two-hour charge provides up to 30 hours of operation at one-second data intervals. 1 3/4" L x 1 1/2" W x 1/2" D. (1 1/4 oz.)