NcStar 3W 150 Lumen LED Flashlight QR with 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 full size semi-automatic 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 CR123A Lithium Type Battery (Included)- Length: 2.7"- Weight: 3.0 oz. (with Battery).