This compass will keep you on course, but won't weigh you down. It is ultra-lightweight at only 1.3oz (36g) and super compact at just 4.25" (10.9cm) long. The compass includes a 360 degree rotating bezel for orienteering use. Also includes a fixed declination scale for improving the accuracy of bearings. The built-in 3X magnifying glass and six measurement scales make reading any map a breeze. Easily attach to your neck, backpack, or pack with the included break-away lanyard.