The Suunto M-9 is a compact, highly accurate wrist compass, and the choice of those in the know. The unbreakable black polymer housing has a sighting window for accurate bearings, and sighting points on top. Easy to read face has luminous markings for night use. 2.5 degree ratchet mechanism can be used to set desired direction. Hook & Loop strap included. Size: 1.6" x 1.9" x .6" diameter. For an article on how to integrate this compass into a survival bracelet click here.