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