The 625-lumen ProTacRail Mount 2 features a fixed mount for Picatinny rails and uses either a remote switch with momentary/constant on operation or a standard push-button tail switch.TEN-TAPprogramming - Choice of three user selectable programs: 1) high/strobe 2) high only 3) low/highHigh: 625 lumens; 297 m beam; runs 2 hours; 22,000 candelaLow: 60 lumens; 89 m beam; runs 21 hours; 2,000 candelaStrobe for signaling or disorientingRemote pressure switch features momentary/constant on operationIntegrated rail clamp attaches to MIL-STD-1913 rails; easy to attach, secure mountingIncludes remote pressure switch, push-button tail cap switch, remote retaining clips, double-sided tape, zip ties, and M-LOKmountUses two (2) CR123A lithium batteries (included)Durable, anodized aluminum construction with impact-resistant tempered glass lensIPX7 rated with standard button switch installed; waterproof to 1 meter for 30 minutesIPX4 rated with remote pressure switch installedLimited lifetime warranty