Flashlight case is made from high impact, super tough nylon and is "O" ring sealed Unbreakable Lexan Lens with silicone anti-scratch coating is assembled in a heavy duty bezel; O-ring sealed C4 LED technology, impervious to shock with a 50,000 hour lifetime Runtime Ni-Cd: high - 3.5 continuous hours to the 10-Percent output level, low - 10+ hours, Flash - 7+ hours 6-3/4-Inch height by 2-3/4-Inch width; 3-Inch diameter