Garmin Astro 220 Dog Tracking 2.6-Inch Portable GPS Navigator Barometric Altimeter & Brand New 3-Axis Electronic Compass Scratch Resistant Lens On The 2.6-Inch Color Tft Display With Backlit Display & Keypad Resolution: 240 X 160 Pixels Battery Life: Greater Than 20 Hours Using 2 Aa Batteries Usb Mini-B Connector For Data Updates With A Pc