Magellan eXplorist 500 Water Resistant Hiking GPS Waterproof, handheld GPS with USB data port and 16 MB of built-in memory Includes 8 MB of North American maps with roads, parks, waterways, and more Unlimited Secure Digital (SD) card expansion for adding maps via CD-ROM or Web 16-color, high-contrast, backlit LCD display; rechargeable lithium ion battery pack Measures 2.2 by 4.7 by 1.3 inches (W x H x D); 1-year warranty