This is the UK4AA eLED Zoom Front Switch (CL I Div 2) Industrial Light Features: Projection Optics let you zoom with a twist of the bezel from a wide beam to an intense spot Single high-intensity 2-watt LED lasts for thousands of hours and will not break when dropped. Unique eLED circuitry maintains constant brighness for 80% of alkaline battery life Rubber sheath molded over bezel to reduce glare and improve impact resistance (passes 6 ft drop to concrete test) Push-button thumb switch switches light between ON/OFF and high/low intensity with continuous or momentary action New easy loading drop-in battery compartment for quick reload of batteries Hydrogen scrubber catalyst, polarized battery contacts and 0-psi vent minimize explosive risk from leaking batteries Tough, electrically non-conductive, non-corroding ABS and polycarbonate plastic construction. Mounts on all work helmets with accessory mounting clips Proudly made in the USA Firefighters and industrial workers all over the world trust UK's 4AA eLED Zoom flashlight to get the job done. It can be easily attached to a hardhat or helmet for superior hands-free illumination. Our unique zoom feature uses patented projection optics to create a consistent beam that can be focused from wide to narrow by twisting the bezel.