The 625-lumen ProTac® Rail Mount 2 features a fixed mount for MIL-STD-1913 (Picatinny) rails and uses either a remote switch with momentary/constant on operation or a standard push-button tail cap switch. TEN-TAP® Programming - Choice of three user-selectable programs: 1) High/Strobe 2) High Only 3) Low/High High: 625 lumens; 297m beam; runs 2 hours; 22,000 candela Low: 60 lumens; 89m beam; runs 18 hours; 2,000 candela Strobe for signaling or disorienting Remote pressure switch features momentary/constant on operation Integrated rail clamp attaches to MIL-STD-1913 rails; easy to attach, secure mounting Includes remote pressure switch, push-button tail cap switch, remote retaining clips, double-sided tape, zip ties, and M-LOK® mount Uses two (2) CR123A lithium batteries (included) Durable, anodized aluminum construction with impact-resistant tempered glass lens IPX7 rated with standard button switch installed; waterproof to 1 meter for 30 minutes IPX4 rated with remote pressure switch installed Limited lifetime warranty