first off there be better technology out there for flashlight . however , this be good ol' american make hardware . the best feature be the ability to focus the beam . I can get a great beam of light 200 yard when I focus it . the 6 cell be double as strong as the 4 cell in Lumens plus it also last a hour longer . it can also act as a self defense tool , you would not want to get hit with this thing when it be full of Batteries !! what a great price too , you can not beat this deal anywhere ! I buy three !!!