The LED Compact Flashlight QR w/Strobe will disorientate your target and extend battery life. Quick Release Mount that will fit most 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. Uses 1 CR2 Lithium Type Battery.