Handheld GPS devices are portable tools that use satellite signals to determine your exact location on Earth. They are commonly used for outdoor activities like hiking, camping, and geocaching. These devices display maps and provide directions, helping users navigate unfamiliar terrain. Most handheld GPS devices are equipped with features such as waypoints, which allow users to mark specific locations, and tracking capabilities to record routes. They often come with built-in compasses and altimeters, enhancing their usefulness for outdoor enthusiasts. Popular brands include Garmin and Magellan, known for their reliability and user-friendly interfaces.