Gerber 22-80081 Infinity Ultra-M Military Grade NVIS Green LED Flashlight, Black Comes with a detachable metal pocket clip that fits on the brim of a hat with ease for hands free use Full color rendering for map reading Uses one AA battery that will last up to 100 hours Weighs just 3.2-Ounce 3-1/4-Inch in length and about 3/4-Inch wide