The ProTac Rail Mount HL-X Pro is a lightweight, low-profile long gun light that produces 50,000 candela of power. Its Jack-Cap tail switch offers operational switch redundancy push-button operation or remote pressure switch operation. Runs on either two CR123A lithium batteries or one SL-B26 USB battery pack. The Ten-Tap programming allows operator to choose preferred operating mode: High/Strobe, High Only, Low/High. This model includes complete system.