... resolution:240x320 Product DescriptionNava GPS are affordable and easy-to-use and provide the necessary features for data collection and mapping ... Lithium, USB, vehicle power adapter, AC adapter. User data compatibilityExport and import user data from gpx, shp, MIF to NAVA proprietary format ... CalculationYesCoordinate SystemWGS84, UTM, Preset Multi coordinate systems, User Grid CHEAP HANDHELD GPS