MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
50-650 knot range; 2000 feet/ range vertical speed indicator; altimeter-precision dual diaphragm, 3 pts, 80k range cal to 55k, in hg/mb baro scale; portable, self-contained unit; tests and calibrates aircraft pitot-static systems; 115/230 vac; 50-400 hz; fiberglass carrying case; 9.76 in. X 15.4 in. X 14.9 in.