The Streamlight ProTac Rail Mount HP-X USB Pro System is a high-performance, long-range weapon light designed for superior illumination in low-light environments. Featuring an 800-lumen output with 105,000 candela, this light delivers a powerful 648-meter beam on high mode. Its Jack-Cap tail switch provides dual-switch functionality with both push-button and remote pressure switch operation. Designed to fit MIL-STD-1913 rails with an included M-LOK mount, this rechargeable system offers multiple power options, including CR123A batteries or the SL-B26 protected Li-Ion battery pack. With TEN-TAP programming, users can customize their preferred operating modes, including High/Low/Strobe settings. The IP67-rated waterproof construction ensures durability, making it a reliable choice for tactical and professional use.