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 brightness 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.