Features: Strobe feature! Strobe Flashlight feature will disorientate your target and extend battery life. Quick Release Mount that will fit most Weaver/ Picatinny type rails. This model will fit Weaver/Picatinny type rails found on most mid size and compact semi-automatic pistols (not Sub-Compact and Pocket pistols). Push Button Rubber Switch on the left side of flashlight and a Push Button Rubber Strobe Button on the right side of the flashlight. 3 Watt Bright CREE LED 150 Lumens Peak Output Uses 1 CR2 Lithium Type Battery (Included) [Smaller/Shorter Battery than the CR123A] Length: 2.4" Weight: 2.6 oz. (with Battery) NOTE: NcSTAR has always made a practice of providing the best products at the best prices. Due to technology advances we have upgraded all of our flashlights to higher lumen values as stated on our website. Until old packaging and instructions sheets are depleted and updated you may receive packaging or instructions stating the old lumens, but rest assured that all of the NcSTAR flashlights will have the lumens stated on the website. International orders will not include batteries.