Brunton Truarc 5 - Mapping Compass.TruArc(TM) Global Needle system means you don't have to buy a new compass when you make that trek to South America or Australia, and tool-less declination adjustment will keep you on course anywhere in the world. Overall Dimensions: 2.9 in x 4.2 in x 0.6 in (7.4 x 10.6 x 1.5cm)Weight: 1.8 ounces (51 grams)TruArc Global Needle; 2 degree resolution; Map magnifier; -Inch/CM scales.