Garmin eTrex Summit HC Handheld GPS Receiver High-Sensitivity, WAAS-Enabled GPS Receiver Provides Peak Performance In Any Environment Built-In Basemap Includes Lakes, Rivers, Cities, Interstates, National & State Highways, Railroads & Coastlines Barometric Altimeter & Electronic Compass Usb Compatible For High-Speed Map Downloads Features A 1.7-InchH X 1.3-InchW Screen With 256-Level Color Tft