The Dakota 20 is the Oregon series little brother with its 2.6 inch&44; sunlight-readable&44; colour touch screen display The Dakota series comes preloaded worldwide topographic map&44; 3D map view & a built-in worldwide base map with shaded relief give you all the tools for serious climbing or hiking Compact & waterproof&44; Dakotas feature a high-sensitivity GPS receiver with Hotfix that acquires your position quickly & maintains its precise GPS location even in heavy cover & deep canyons Dakota comes preloaded with a worldwide base map&44; plus 850 MB internal memory for map transfers Electronic compass that shows your heading even when the unit is not held flat Barometric altimeter that will provide you with precise elevation readingsmicro SD card slot & wireless unit-to-unit connectivity for sharing your waypoints&44; tracks&44; routes & geocaches wirelessly with compatible Dakota&44; Oregon&44; Colorado & Foretrex devices Waterproof standard: IEC 60529 IPX7USB interface Unit dimensions: 9.9 x 5.6 x 3.3cm Up to 20 hours of battery life&44; 2 AA; Ni-MH or Lithium recommended Weight: 6.75oz (191g) with batteries The Dakota units are not equipped with a bike mount&44; please also see GMS014