The Eclipse 8099 is an all-in-one professional compass that serves as both a baseplate and a mirrored sighting map compass. Designed for easy-navigation, the 8099 features three clinometer systems and Brunton's patented circle-over-circle alignment system. Includes field reference cards for mapping and emergency skills. 4.1"x2.5"x1" 3.6 oz. Magnified read out 1� graduations Field reference cards 3 inclinometer systems Declination adjustable USGS map scale 1:24k, ft., UTM. mile "Circle over circle" alignment system Map magnifier Lanyard