24 hour, 6 position display w/optional 12 hr time mode; digital readoutdisplays hour, minute, second; water resistant to 45 psi; shock resistant; accurate porm 0.5 seconds per 24 hrs; self luminous lighting matl phosphorescent w/radiation source; min luminosityof 0.03 foot-lamberts and max luminosity of 0.05 foot-lamberts; case surf. Fin. Dull nonspecular/non reflective metal; case back matl ss; crystal matl plastic or glass; electrically powered by 2 self contained power cells; watchstrap matl nylon conforming w/mil-s-46383; case dim. 1.600 in. Lg, 1.500 in.W, 0.600 in. H