The M6 2320 Flashlight uses 2 CR123 lithium cells (included) to power a hi-pressure Xenon lamp for intense brightness. The tough CNC-machined aluminum chassis has a knurled body for a secure grip. Plus, the convenient push button tail cap switch has a safety lockout feature to prevent inadvertent battery depletion or accidental activation. It comes with a free Cordura¦ holster with back-up battery pouch. The M6 2320 is the ideal tactical flashlight, with its durable design and blinding beam. The newest addition to the Black Knight Series is the M6 Lithium. This new light is sure to be a vital asset to the Law Enforcement market with its extreme brightness and durable construction enables it to withstand rugged conditions while out in the field. You break it, we replace it... forever.