Ruggedly constructed and beautifully finished the X-Series started the LED flashlight revolution. Today the X-Series is still recognised as being the ultimate collection of flashlights in the field and has earned the praise of countless users who havee to depend on them as well as curators at one of the world"s most famous museums of modern art where a sample has been placed on permanent display.Long hours of usable light powerful beams unmatched quality and superior styling all make the X-Series the choice for those who want a flashlight that provides upromising performance.Dimensions: (length by diameter) 5.84" x .861" 1.1" head dia. Weight: 5.43 ozLumens: 85Runtime: Up to 3 HoursEffective Range: Up to 147 ftSignal Visibilty: Up to 2 milesBattery Type: 2 - AA alkaline