The Streamlight Stylus PenLight is a bright, long-running LED penlight designed to go anywhere. Machined from aluminum with a black anodized finish and non-slip knurled grip, it is built for durability and tactical use. It provides 11 lumens of white light for up to 24 hours, making it ideal for tasks that require preserved night vision. Black Anodized Aluminum construction, OAL 6.21, Body Diameter 0.38, Weight 1.10 oz, Water Resistant, modes Constant On / Momentary. This model includes three AAAA alkaline batteries, a pocket clip, and a glare guard. Its slim profile and tail cap switch allow for easy operation in professional or covert environments with a 24-meter range.