TruArc 7 mirrored compasses feature an inclinometer for measuring apparent tree heights and gauging avalanche danger and can be used as a sighting tool for even more accurate headings. The TruArc Global Needle system and tool-less declination compensation ensures worldwide capability. Features: TruArc Global Needle, Ever-north Magnet, 2° resolution, sighting mirror, clinometer. Dimensions: 2.9" x 3.9" x 0.8". Wt: 2.2 oz.