The Garmin eTrex 30x GPS stacks 3 choice features onto the already-robust eTrex 20x: a barometric altimeter, a 3-axis electronic compass, and the ability to share geocache information wirelessly.
Features
Features a 2.2 in., 65k color display with increased (240 x 320 pixels) resolution that can be viewed in bright sunlight
3.7 GB memory lets you load a variety of maps, including TOPO 24K, HuntView, BlueChart g2, City Navigator NT and BirdsEye Satellite Imagery (sold separately)
Comes with a built-in worldwide basemap with shaded relief that helps you navigate with ease
WAAS-enabled receiver locates your position quickly and maintains reception under heavy cover
Compatibility with Russian Glonass system allows about 20% faster and more reliable satellite acquisition, helpful in challenging spots such as deep canyons or tall buildings
3-axis, tilt-compensated electronic compass shows your heading even when you're standing still and holding the unit upright or at an angle
Altimeter tracks changes in barometric pressure to pinpoint your altitude while you're on the trail
Supports geocaching GPX files for downloading geocache locations and details straight to the unit using the high-speed USB connection
Allows wireless unit-to-unit transfer of routes, tracks, waypoints and geocaches; works with Montana-series, Oregon-series, Dakota 20, GPSMAP 62S, 62ST, 78S and 78SC devices
Waterproof design meets IEC 60529 lPX7 standards (can be submerged to 1m for up to 30 min.)
With an array of compatible mounts, eTrex is designed for use on ATVs, bicycles, boats, as a handheld, or in your car
2 AA batteries (sold separately) provide up to 25 hrs. of use