EagleTac D25A2 Clicky 453 Lumens Cree XM-L2 U2 Brightest Penlight w/ Bonus Keychain Light - Cool White 453 lumens features latest Cree XM-L2 U2 LED - One of the most powerful Penlight available Use two commonly available AA Battery (Ni-MH or Alkaline) 4 Different Brightness Setting & Strobe: 453lm/1.4hr, 296lm/2.5hr, 33lm/24hr, 1lm/200hr Include a bright bonus Lumentac keychain light 10 Years warranty service, buy with confidence!