Brunton Com-Pro Pocket Transit Compass - 0 to 360° Developed using composite materials for the body, the ComPro is a lighter, more affordable alternative for transit users. It incorporates a cast NdFeB, rare-earth magnet, precisely balanced on a sapphire bearing. The result is a powerful magnet, which seeks magnetic north very quickly and allows for faster readings. Call us for special balancing.Features:Single NdFeB magnet resists demagnetization better than other types of magnets for increased reliability Azimuth accuracy ±1/2° with 1° graduations Vertical accuracy ±1/2° with 1° graduations and 10 minute readability Vertical angle measurements to ±90° or 100% grade A percent grade scale with increments of 5% Induction damped needle for quick, accurate readings Sapphire jewel bearing allows for smooth needle movementMagnetic declination adjustment allows for east or west declination setting to 180° Short and long sights for increased accuracy when sighting azimu