Garmin eTrex 20x UPGRADED DISPLAY - Features a 2.2 65K color sunglight readable display offering increased resolution (240 x 320 pixels) LOAD MORE MAPS - Large 3.7 GB of internal memory and microSD card slot lets you load a variety of maps, including TOPO 24K, HuntView, BlueChart g2, City Navigator NT and BirdsEye Satellite Imagery (subscription required) PRELOADED BASEMAP - Includes a worldwide basemap with shaded relief. Display size:1.4 x 1.7 inches KEEP YOUR FIX - With its high-sensitivity, WAAS-enabled GPS receiver, HotFix satellite prediction and GLONASS support, eTrex locates your position quickly and precisely and maintains its location even in heavy cover and deep canyons