Brunton Survey Master Lighted Dual Instrument Sighting Compass and Clinometer Brunton Product Includes compass Great for camping Azimuth / bearing accuracy +/- 0.5 degree with 1 degree resolution; Rubber line for direct azimuth/bearing readings from the side accurate to +/- 2.5 degree It also features sine and tangent tables for quick reference, useful distance conversions and two tripod adapter holes for azimuth and inclination measurement using our tripod or monopod. Azimuth / bearing accuracy +/-0.5-Degree with 1-Degree resolution Overall dimensions: 5.9"x2.1"x0.7" Optional leather case available.