Haven't used the GPS and it's sitting in the box on the shelf. 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 Built-in sensors - etrex 30x adds a built-in 3-axis tilt-compensated electronic compass and a barometric altimeter which tracks changes in pressure to pinpoint your precise altitude, and you even can use it to plot barometric pressure over time Wireless - wirelessly share your waypoints, tracks, routes and geocaches with other compatible devices -simply press "send" to transfer your information -also wirelessly connects to compatible garmin devices, including virb and accessory sensors. Battery life - 25 hours