Don’t let the slim size of the Streamlight ® Stylus 3™ flashlights fool you. At only 16.5cm 61⁄2" long and weighing a mere 31 grams 1.1 ounces, the light from a Streamlight ® Stylus 3™ features a high intensity, solid-state LED bulb rated to last more than 100,000 hours under normal use. The Stylus 3™ has the same form factor as a standard ballpoint pen, so it fits easily in a shirt pocket. The Streamlight ® Stylus 3™ is waterproof. The white version of the Stylus 3™ can be used as an oblique light source to direct across a surface. The blue light shines in the 450nm range and can be used as a general search for body fluids such as semen, urea and fibers. Requires 3 AAAA batteries included.