The Klein LED penlight provides 8 lumen LED beam with 50,000 lamp-hours of life. It's powered by 3 AAAA alkaline batteries with 50 hours of life. Housed in unbreakable Xenoy® plastic, the pocket clip is molded into the body so it can't break off. This material is also resistant to chemicals, water, and corrosion. Push button on/off provides constant and momentary modes. It's 6.2" long and has a 5 mm Nichia white LED light bulb. Batteries are included. Made in USA.