Battery Two AA alkaline Bulb 2.4 Volt 1.3 watt, krypton KPR-104 Material Shock resistant polymer with elastomeric grip; unbreakable polycarbonate lens. Colors Yellow Olive Drab Weight (with battery) 5.6 ounces Length 5 inches Run Time Up to 3.5 hours Special Features Convertible flashlight/headlamp; 180° tilting head; large rotary on/off switch.