, gps handheld device with 2.2-inch sunlight-readable colour display and preloaded with topoactive maps with routable roads and trails for cycling and hiking , support for gps and glonass satellites allows for tracking in more challenging environments than gps alone , built-in 3-axis compass and barometric altimeter help you keep your bearings , 8 gb of internal memory for map downloads plus a micro sd card slot and supports paperless geocaching for downloading geocaches and details straight to your unit , rugged, impact resistant and water-rated to ipx71 , Display size: 3.5 centimeters , Battery Life : with up to 25 hours in gps mode with 2 AA batteries