The Streamlight ProTac HL-X Pro is a long range, low-profile, gun-mounted light that produces 50,000 candela and shines for 447 meters. Its Jack-Cap tail cap switch offers operational switch redundancy with both push-button operation or remote pressure switch operation. FeaturesMulti-Fuel: Uses one (1) Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack; also accepts two (2) CR123A lithium batteriesTEN-TAP programming allows for selection of three different operating programs: 1) high/strobe 2) high only 3) low/highIntegrated rail clamp attaches to MIL-STD-1913 (Picatinny) railsEasy to attach, secure mountingDurable, anodized aluminum construction with impact-resistant tempered glass lens