Impact resistant. Water resistant. Modes: High (350 lumens, 2.25h runtime); Low (135 lumens, 5h runtime). 118m beam distance. Ultra-bright blue LED safety tail light. Fits traditional and modern-style fire helmets (above or below helmet brim). Reflective strip. Individually serialized. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.