Big, Tough GPS/GLONASS with Birdseye Subscription 4-inch dual-orientation, glove-friendly touchscreen display Tracks both GPS and GLONASS satellites 1-year BirdsEye Satellite Imagery subscription 3-axis compass with barometric altimeter Take it hiking. Take it hunting. Take it on the water. Montana 610 features a bold, color touchscreen, dual-orientation display and includes a 1-year BirdsEye Satellite Imagery subscription. It also supports multiple mapping options like BlueChart? g2 and TOPO U.S. 24K. Handheld includes 3-axis tilt-compensated compass, barometric altimeter and access to both GPS and GLONASS satellites for improved positioning and typically faster fixes. See the Big View Montana 610 features a 4-inch, sunlight-readable touchscreen display that offers crystal clear, enhanced colors and high-resolution images. Its easy-to-use interface means youll spend more time enjoying the outdoors and less time searching for information.