Streamlight ProTac Rail Mount 1L-X USB 850 Lumens LED Weapon Light Black. Powered by one (1) Streamlight SL-B9 rechargeable lithium-ion battery pack or one (1) CR123A battery this tactical light delivers high lumen output for superior visibility in low-light environments. Specifications for Streamlight ProTac Rail Mount 1L-X USB 850 Lumens LED Weapon Light: Manufacturer: Streamlight Light Output: 850 lumens Bulb Type: LED Color: Black Beam Distance: 346 m Battery Life: 4.5 hours Water Resistance Level: IP67 Features of Streamlight ProTac Rail Mount 1L-X USB 850 Lumens LED Weapon Light 850 lumens 30000 candela and 346 meter beam on High Switch to Low mode for 4.5 hours runtime Multi-fuel: accepts (1) CR123A batteries or (1) SL-B9 Li-Ion USB Rechargeable Battery Pack (included) High/Low/Strobe modes; TEN-TAP Programming to choose your preferred operating mode Features a standard push button tail switch for ease of activation without a pressure pad MIL-STD-1913 Picatinny rail and M-LOK mounts included IP67-rated; waterproof to 1 meter for 30 minutes Package Contents: Streamlight ProTac Rail Mount 1L-X USB 850 Lumens LED Weapon Light Gun light tailcap switch mounting hardware M-LOK mount (1) SL-B9 battery pack USB cord Streamlight 89027: ProTac Rail Mount 1L-X USB 850 Lumens LED Weapon Light Black