Remote pressure switch features momentary and constant on operation Includes remote pressure switch, push button tail switch, remote retaining clips, double sided tape zip ties Durable, anodized aluminum construction with impact resistant tempered glass lens The Streamlight 88066 ProTac Rail Mount HL-X is a 1,000-lumen weapon-mounted light featuring a rail clamp designed to rapidly and securely attach/detach from rifles, carbines, and submachine guns with a MIL Standard 1913 Rail. It uses either a remote switch with momentary/constant on operation or a standard push-button tail switch, and can run on either two CR123A lithium batteries or one Streamlight rechargeable 18650 battery.