Dimensions: 1.6″ x 2.2″ x 0.5″. Turnable housing with Silva 1-2-3 system. Waterproof. Sighting system. Two scales that are easy to place directly on to your route map. Black and red north/south lines. Luminous markings for night use. Built in sundial. 360 degree graduation. Liquid filled capsule with Swedish steel needle. Fiberglass housing. Clam packed.