Multi-Fuel - Uses rechargeable Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack or two CR123A lithium batteries; TEN-TAP Programming - Choice of three user selectable programs; Durable, anodized aluminum construction, Unbreakable pocket clip; IP68 rated, dust tight and waterproof to 2 m, All openings O-ring sealed; 2 m impact resistance tested; Anti-roll head; RoHS compliant; CEC Compliant (ProTac HL-X USB only); Meets applicable European Community Directives, CEC complaint