Measures 4 7/8" x 2 7/8" closed. Clear acrylic base with lanyard slot. Features a sighting mirror, dual inclinometer, TruArc Global Needle, Ever-north magnet, inch/metric scale, 2 degree resolution, map lines and tool free declination adjustment ensures worldwide compatibility. An inclinometer for measuring apparent tree heights, gauging avalanche danger and can be used as a sighting tool for even more accurate headings. Neon green and black adjustable lanyard. Hang packaged.