Constructed of aircraft-grade aluminum body with non-slip grip. Non-rolling geometry. High-impact polycarbonate window safeguards LED. Knurled tailcap switch with momentary/on/off/lockout features. Uses a 3.8 watt LED that projects light up to 150 ft. Uses 2 AA alkaline batteries.ATTRIBUTES Batteries Included: Yes Bulb: LED Finish: Graphite Material: Aerospace Aluminum Overall Length (inches): 5.50 Power Source: AA x 2 Switch: Momentary/On/Off/Lockout