5" overall. Slim, lightweight personal light that can be used as a life-saving beacon in times of distress. 185 degree articulating head features a slide-in-place diffuser that projects omni-directional light. Four LEDs provide all colors needed for a distress marker. White C4 LED (55 lumens); Blue LED (1.8 lumens); IR LED for covert operations; Green LED (4.5 lumens). Uses two AA batteries (included). Aluminum plate provides flat surface to adhere Velcro for attaching to helmet. Cord attachment holes provided in battery compartment cover capable of supporting 25lb load. IPX-7 rated design. Waterproof to 1 meter for 30 minutes. O-ring and gasket-sealed openings for waterproof operation. High-impact, super tough, nylon casing. Gasket-sealed, unbreakable polycarbonate lense with scratch-resistant coating. Color: Coyote Tan. Assembled in USA.