6.63 in. made of machined aluminum alloy and rubber band grip on the body. Has 10 LEDs for 100,000 hours of life, burn time with 3 LEDs 80 hours and with 10 LEDs 25 hours. Takes 4-AA batteries that are included. Weighs 9 ounces. Includes wrist strap and nylon carry case with belt loop. Water resistant. 2 mode push button on/off switch.