The Trailpilot 2 is a carabiner-mounted analog compass with digital temperature display that helps you navigate a map with confidence and ease. Air filled analog map compass with adjustable declination. Rotating navigation bezel. Carabiner clip. Consumer serviceable battery (SR1120W) included. Digital thermometer with user selectable F or C display. Temperature working range from 14 F (-10 C) to 122 F (50 C).Dimensions: 3.5 in. x 2.5 in. x .4 in. Wt. 1.5 oz.