This lensatic compass from CAMMENGA has been used by US troops, law enforcement, special forces, and outdoor enthusiasts for years. The tritium light sources provide readability in total darkness, with a life-span of 10 years. This compass features both a 0-6400 mils scale (20 mil resolution) and a 0-360 degree scale (5 degree resolution), with an accuracy of +/- 0002 mils.Other features:  ¥ sapphire jewel bearing,  ¥ rotating bezel ¥ magnifying sighting optic ¥ cast aluminum frame ¥ olive drab pouch with belt clip