The TLR-2S is a lightweight, compact, lithium battery powered Gun-Mounted Tactical Light with integrated aiming laser featuring the latest in shock-proof power LED technology and providing at least 2.5 hours of continuous run time when in dual mode with the high power visible laser. Rail clamp designed to rapidly attach/detach from side of weapon. Tethered battery door and latch mechanism prevents battery door loss while providing easy battery replacement. Included are two CR123A lithium batteries and locating keys for use with Glock style, Picatinny, Beretta 90two, S&W 99 and S&W TSW.