The powerful Streamlight Stylus Pro Flashlight is no larger than a pen, yet produces 48 lumens of white light from its shock-proof LED bulb. Additional features include an aircraft aluminum body, unbreakable polycarbonate lens, O-ring seal, tailcap activation switch, pocket clip and belt holster. Requires 2 AAA batteries (included) for a 6-1/4 hour runtime. Lifetime factory warranty.