The ProTac Rail Mount 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. Specifications for Streamlight ProTac Rail Mount HP-X Pro CR123A 800 Lumens Weapon Light System: Manufacturer: Streamlight Light Output: 800 lumens Battery Type: CR123A Color: Black Beam Distance: 648 m Weapon Mount Type: Picatinny Battery Life: 26 hours Package Type: Box Battery Quantity: 2 Water Resistance Level: IP67 Water Resistant Mark: 1 m Features of Streamlight ProTac Rail Mount HP-X Pro CR123A 800 Lumens Weapon Light System 800 lumens, 105,000 candela and 648 meter beam on High Switch to Low mode for 26 hours runtime Multi-fuel: accepts (2) CR123A batteries or (1) Streamlight SL-B26 protected Li-Ion battery pack High/Low/Strobe modes TEN-TAP Programming to choose your preferred operating mode Fits long guns with MIL-STD-1913 rails; optional M-LOK mount included IP67-rated; waterproof to 1 meter for 30 minutes (without remote pressure switch installed); IP54-rated; water-resistant (with remote pressure switch installed) Package Contents: Streamlight ProTac Rail Mount HP-X Pro CR123A 800 Lumens Weapon Light System (2) CR123A Lithium Batteries Jack-Cap M-LOK Kit Momentary Pressure Switch Mounting Hardware