The Streamlight ProTac 2L-X is a 500 lumen EDC tactical light and incorporates the versatility to use two battery types; two CR123A batteries or one Streamlight Rechargeable Li Ion cell see Battery detail below . Multi battery versatility means the user can always use primary disposable cells to power the light if the rechargeable cell is out of power and a charging source is not available. Designed for use in all markets, it features a tactical tail cap switch for momentary or constant on operation, three different user selectable programs and a pocket clip for convenience. The aluminum housing with Type II Military Spec anodizing helps make the light extremely durable and abrasion resistant. Packaged with a removable pocket clip and holster.