Garmin Edge 605 GPS Enabled Cycle Computer With TOPO GB DVD A unique GPS-enhanced cycle computer that provides extensive and accurate data to make this an invaluable training partner. Completely wireless operation, making installation easy. Uses a high-sensitivity SiRF GPS receiver to track your movements. Virtual Partner lets you race against a virtual competitor, or against yourself when repeating a route. Auto Pause suspends the training timer if you slow below a given speed. Auto Lap automatically starts a new lap recording at a preset location or distance. Includes Garmin Training Centre software for post-ride analysis or workout planning. The large screen can be backlit at night for easy viewing, and customised to show the data you want. Waterproof to IPX7 standard (up to 1 metre for 30 minutes). Uses a rechargeable li-polymer battery, providing up to 15 hours operation. Unit dimensions (cm) - W x H x D: 5.1 x 10.9 x 2.5. Display size (cm) - W x H: 3.48 x 4.36 - diagonal 5.6 cm. Weight: 104.9 g. The unit accepts microSD cards (not included).