Product Details With both forward and reciprocal bearings, plus 90° quadrants and 6400 point MILS, the OMNI-SIGHT spot-through compass offers the convenience of multiple precision instruments in one hand-held unit. Steadfast aluminum housing ensures ruggedness and reliability, and the internal rare-earth magnet guarantees accuracy and resists magnetic interference. Illuminated Readout: Light piping gives a clear bright readout even in lowlight Rare Earth Magnet: Resists magnetic interference and will not lose polarity. All-In-One Scales: 360 Degree azimuth, reciprocal bearing, quadrants, MILS. Dimensions OVERALL DIMENSIONS - 2.5” X 3.5” X 0.5” WEIGHT - 11.8 OZ FEATURES -1 DEGREE RESOLUTION; MADE IN THE USA.