Whether youre actively involved in geocaching or just looking for a portable GPS unit to take with you on a hike into the woods or the urban jungle, the Garmin eTrex 30 X GPS Unit is sure to be useful. This easy to use navigation device will indicate your current position and lay digital breadcrumbs showing where youve been. The handheld GPS units 2.2 65K color sunlight-readable screen displays your position in an easy-to-read manner. You can attach this GPS to many different items with a variety of optional mounts. This unit utilizes both GPS and GLONASS satellites for quicker signal acquisition so you get a fix on your position approximately 20 times faster than GPS alone. The receiver also can interpret Wide Area Augmentation System (WAAS) signals so you can receive information from terrestrial antennas even when your view of the sky is obstructed.