The Gerber Cortex 675 Lumen Tactical Flashlight with Pocket Clip has been designed to be the perfect high powered flashlight for all of your lighting needs. Running on either three (3) Lithium CR123image batteries or two (2) AA batteries, this Flashlight from the experts at Gerber can utilize multiple power sources when having options is critical. With a maximum output level of 675 lumens (when running on three CR123 batteries), the Gerber Cortex Flashlight provides a level of light useful for overwhelming an aggressor or identifying a threat. This Gerber Flashlight also offers a strobe mode for tactical applications and a low output mode for administrative duties. For a great looking and lightweight way to make sure you have all the light you need to be successful in any tactical situation, choose the Gerber Cortex 675 Lumen Tactical Flashlight.