5 1/2” overall. Black rubber armored body with anti-roll head. O-ring sealed. IPX4 rated design. Features C4 white LED. 3 modes: high, low and strobe. Momentary blink or constant on switching for all modes. Up to 200 lumen output on high setting and 10 lumens on low setting. Uses two 3 volt 123A lithium batteries Up to 50 hour burn time per battery set on low setting. Up to 2 1/2 hour burn time per battery set on high setting. Hang packaged.Lithium Metal with package.