Nite Ize X2DM-HMO Inova X2 Powered by 2-AA Alkaline Batteries, Mossy Oak High-Powered, energy efficient 70,000 hr. LED Patented optical system, precision machined aluminum reflector with thermal management interface Water-resistant construction and O-Ring seals 3 Position End-Cap Switch activates constant and momentary high and low as well as a lockout mode Dimensions (Length x Diameter): 5.84" (14.83 cm) x .861" (2.19 cm) 1.1" (2.80 cm) head diameter Weight: 5.43 oz. (154 g)