Nightstick FORGE Helmet-Mounted Multi-Function Flashlight Black. The 4640 outshines the competition with its powerful 360-lumen tightly-focused flashlight and a beam distance rating of 218 meters (715 feet). The user can also choose a lower 180-lumen setting for increased runtime. The 4640 also features a 30-lumen for 30 hours Survival Mode. The 4640 will fit on any Fire Helmet (or side-brim hard hat) regardless of whether it has an up-turned or down-turned brim thanks to the multi-angle mount that allows the user to fine-tune the exact light position and angle for optimal aim. This feature makes it possible to not only avoid goggles face shields and other helmet-worn gear but also place the light exactly where its needed. The 4640 is IP-X7 rated waterproof and meets the requirement for NFPA-1971-8.6 (2013). Power comes from 2 included CR123 batteries. Specifications for Nightstick FORGE Helmet-Mounted Multi-Function Flashlight: Manufacturer: Nightstick Color: Black Light Output: 360 lumens 180 lumens 30 lumens Weight: 7.2 oz Features of Nightstick FORGE Helmet-Mounted Multi-Function Flashlight User-selectable 360-lumen High 180-lumen Low and 30-lumen Survival modes A single push-button switch operates easily with heavy gloves Switch features built-in rear-facing green safety LED 360-degree multi-angle mount allows the user to select exact angle and position for optimum light alignment and clearance of face shields goggles or other equipment Helmet clamp with rubber foot provides secure mar-free attachment Works with virtually all fire helmets and hard hats Impact & chemical resistant Waterproof Meets the requirements for NFPA-1971-8.6 (2013) Serialized for personal identification 2 CR123 batteries (included) Package Contents: Nightstick FORGE Helmet-Mounted Multi-Function Flashlight 2 CR123 Lithium batteries Nightstick NSP-4640B: FORGE Helmet-Mounted Multi-Function Flashlight Black