4 3/4'' overall. Five selectable modes: high power, strobe, nite-lite, signal and SOS mode. ''Spot-to-Flood'' adjustable LED beam with up to 172 lumen output. Red anodized aluminum construction. Push button tail cap switch. Motion-controlled variable power level and strobe rate. Uses three AAA batteries (included). Battery life: 2 hours, 30 minutes on high, 218 hours on low. Water resistant. Black hardshell gift box.