For a lifetime of reliable service, the Streamlight Stinger LED Flashlight is hard to beat. It features a variable output LED bulb that produces up to 640 lumens of clean white light, a parabolic reflector for long distance beam travel, unbreakable polycarbonate lens, O-ring seal, and aircraft aluminum body. Featuring the Dual Switch Technology that allows access to three lighting modes and strobe via the tail cap or the head-mounted switch. The Stinger DS LED HL Flashlight comes with a 3.6 Volt Ni-MH sub-C battery, that is rechargeable up to 1,000 times, and two charger holders with DC adapters.