A lighting tool for the 21st century, the elegant Stylus combines the convenience of an ultra-slim pen light with a high intensity LED which lasts 100,000 hours. Perfect for tactical use and covert operations, while preserving precious night vision, Stylus runs over 10 hours. It's waterproof, machined aluminum case comes in black, gold or silver and has a momentary blink switch plus constant "on". The 3-cell version measures 6.6" and weighs 1.1oz. Each Stylus is individually serialized, and features a pocket clip as well as a lifetime warranty. Carry Stylus anywhere. It's the dependable, comfortable lighting companion. Battery: Three (3) AAAA alkaline batteries Bulb: 100,000 hour lifetime, hi-intensity Light Emitting Diode (LED), "solid-state bulb". LED: White Body: US Flag Material: 6000 series tempered aircraft aluminum with anodized finish non-slip knurled grip. Weight: (with batteries) 1.1 Ounces Dimensions: .38" (Dia.) x 6.21" (L) Run Time: Over 10 hours Power: White 4.3 lumens Special Features: Waterproof individually serialized momentary blink switch and constant "on" pocket clip blister packaged WHICH LED COLOR IS RIGHT FOR YOU White - Most popular for all-around use. Very close to natural light, which allows you to see "true color" Green - Extremely bright. Great for outdoors because it preserves night vision. For hunters it won't spook game. Blue - Extremely bright yet easy on the eyes. Ideal for various industrial and automotive applications. Also commonly used in forensics. Red - Ideal for signaling. Preserves night vision.