The Streamlight TLR-2S Tactical Illuminator Flashlight with Laser is ideal for use on most firearms with a rail and installs in just a few seconds This updated model features C4 LED technology with 300 lumens peak output, and adds a strobe feature that is ideal for disorienting an assailant The light will run for up to 2-1/2 hours on 2 CR123A batteries (included) In addition to the light, this model also features a high power laser which will run for up to 45 hours The body of the TLR-2S is constructed of rugged aluminum and is water, shock and dustproof The laser is protected by chemical resistant polymer housing The TLR-2S is covered by Streamlight's No Excuses lifetime warranty