Aviton GPS Navigation Unit with Full-color, 3 1/2-inch touch screen. Full-color, 3 1/2-inch touch screen ensures no-hassle menu navigation. iGo navigation software with 2-D and 3-D mapping provides an accurate view of streets. TeleAtlas maps of the US and Puerto Rico let you travel with ease. Centrality Atlas dual core promises quick responses to your needs. Route recalculator points you in the right direction if you deviate from your course. Car and pedestrian navigation modes offer versatility. SD card slot allows you to expand the device's memory. Slim, portable design slips conveniently into your pocket for safe transport. Details: Unit: 3.54"H x 3.11"W x 0.75"D Screen: 3 1/2 in. Includes: USB cable, DC adaptor, dash mount, windshield mount &amp; quick-start guide Uses 1 rechargeable li-polymer battery (included)