Get big output from a 1.64-oz. penlight with the Streamlight Stylus Pro LED Penlight. This .5W LED light uses Streamlight's proprietary Micro Optical System (MOS) for optimized output of up to 100 lumens and optimized runtime. Machined from an aircraft-aluminum alloy, the Stylus Pro also features an internal polymer body liner and shockproof switch housing so you can be confident in its performance even under the most extreme conditions. Water- and contamination-resistant thanks to an unbreakable polycarbonate lens and O-ring sealing. Drop-tested to 6' and extensively field-tested. Tailcap switch for 1-handed operation. Unlike ordinary penlight flashlights, this Streamlight penlight comes plated with a mil-spec Type II anodized finish for excellent resistance to abrasion and corrosion. Runs up to 6.5 hours on 2 AAA batteries (included). The Streamlight Stylus Pro LED Penlight includes a nylon holster and pocket clip. Length: 5.3. Mfrs. lifetime limited warranty.Manufacturer model #: 66118. 5W LED kicks out up to 100 lumens for up to 6.5 hours Built tough Solid aircraft-grade aluminum body Internal polymer body liner Shockproof switch housing Water- and contamination-resistant