This light features a xenon lamp powered by two 3-volt lithium batteries (included) and delivers up to 6,000 candlepower light output. The nose-cone adjusts the beam from spot to flood and the aluminum reflector is specially coated for optimum light reflection. A pressure sensitive on/off switch is located at the end of an expanding curly cord for convenient placement on the firearm allowing for light activation without moving your grip. Velcro tape is supplied for switch attachment. Two precision machined mounts are included that fit firearms from .22 caliber to 12 gauge. Made in the USA from 6061 T6 aluminum, the WLS 2000 is shock resistant under recoil, water resistant with O ring seals and corrosion resistant with a quality black anodized finish.