Compass with ruler and magnifying glass for maps

Liquid compact compass specially for use with maps. The compass is mounted on a transparent tablet, which has a magnifying glass and a ruler, allowing you to determine distances and calculate the scale. Magnification of the magnifying glass 2x, for studying small markings on the map. The dial with the magnetic needle is placed in a special solution that accelerates the stabilization of the magnetic needle, which helps to take readings faster. The compass can be hung around the neck using a carrying cord. Diameter, mm 42 Body color: transparent Case material: plastic Dimensions, mm 128x60x16 Ruler length: 120 mm calculation of scale (1:25000 and 1:50000) and distance (from 500 m to 6 km) Magnifier magnification: 2x