NcStar 150 Lumen LED Compact Flashlight QR w/Strobe Features:- NEW 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 Per Output- Uses 1 CR2 Lithium Type Battery (Included) Smaller/Shorter Battery than the CR123A- Length: 2.4"- Weight: 2.6 oz. (with Battery).