Lightweight, compact design easily attaches/detaches above or below brim on fire helmets, industrial helmets, and hard hats 115 lumens; 7,000 candela; 167m beam distance; runs 6 hours Features an ultra-bright blue taillight LED so you can be seen in thick smoke Fits both traditional and modern style helmets Tighten clamp with your fingers. No tools necessary. Swivel clamp and insertable 5° angle adjuster to optimize beam location Rotates 360° on clamp 6,000 Series machined aircraft aluminum construction with high-temperature, shock-mounted, impact-resistant BOROFLOAT® glass lens High-impact, chemical-resistant polymer LED housing with reflective strip IPX7 waterproof to 1 meter for 30 minutes Uses two 3-volt CR123A lithium batteries (included) 3.26 in (8.28 cm); 5.14 oz (145.7g) Limited lifetime warranty Assembled in the USA