Precision 12-parallel channel GPS+WASS receiver, built-in patch antenna, detailed background map of continental US and Hawaii, back-up memory and is compatible with most computer mapping software. Waypoints: 1,000 Event Markers: 1,000 Routes: 10 reversible routes, Plot Trails: 10/10,000 points per trail. Battery life: up to 12 hours of continuous use. Dimensions: 5.67" × 2.5" × 0.9" Weighs: 4.9 oz.