Streamlight's Stylus is a bright, long-running LED penlight that has a long battery life, and goes anywhere you need it. It is machined from an aluminum case with non-slip knurled grip with a removable pocket clip and anodized finish. It features momentary blink or constant "on" operation and is water resistant. This Stylus has a black anodized finish with a red LED bulb and uses three (3) AAAA size alkaline batteries.