Talk about durable. The M6 2330 LED uses a 1-Watt Luxeon LED for intense brightness, extended battery burn time, and long lamp life. The strong body is CNC-machined aluminum with knurled grip for a secure handle. Plus, the convenient push button tail cap switch has a safety lockout feature to prevent inadvertent battery depletion or accidental activation. The M6 comes with a free Cordura® holster with back-up battery pouch. Powered by 2 CR123 lithium cells (included).