The Garmin eTrex Solar GPS is a handheld GPS unit for hiking. This solar-powered unit is lightweight and compact, just right for adventuring outdoors. When used in sunny conditions, the battery life is unlimited, extending the fun for miles of trail. It's also IPX7 rated for water resistance, so you can keep on going, even if the weather takes a turn for the worse. Navigation, geocaching, digital compass, weather, and more, all in one little device.