... compass for military,with ruler,noctilucent,reflector and foldable5.specialitiespoint the super accurate direction,with mirror,foldable,pocket size,printed ... Used in geology perambulation, colliery and other mine exploitation military training. parameter Main specificationsItemsSpecificationsMeasuring proportion1:25,000 1:50, ... scale1°Weight0.15kgSize68×63×26(mm) DQL-4 Geology/Military/Pocket Compass