5 3/4" overall. Black areospace grade aluminum body with advanced reflector and black stainless pocket clip. White CREE LED. Light output: high - 550 lumens, low - 15 lumens. Beam distance: up to 187m. Waterproof: up to 2m. Impact resistance: up to 3m. Runtime: high - up to 80m, low - up to 58H. Features six modes: momentary on, turbo, high, medium, low and strobe. Patented innovative "Intelligent Switch" with "Click-and-Tap" functions for easy momentary activation or mode switching. Uses two CR123A batteries (included). Black nylon lanyard.