Cammenga S.W.A.T.Black Tritium Lensatic Compass, Vertical Black Luminosity: Tritium, Jewel Bearing: Sapphire, Rotating Bezel: Bi-DirectionalClimate Capacity: 50 F below zero to 150 F above , Frame Materials: Cast Aluminum, Waterproof: Yes, Expected Luminous Life: 10 YearsAccuracy: plus/minus 0002 mils, Dial Readings: Degrees and mils, Casting: AluminumDamping Process: Induction, Carrying Pouch: LC-1 w/Belt Clip, Lanyard: Included (No Liquid Req.)