Streamlight ProTac Rail Mount 1L-X USB Pro 850 Lumens LED Weapon Light Black. Featuring the innovative Jack-Cap tail cap this light offers dual operational redundancychoose push-button activation or remote pressure remote pressure switch while the rail clamp system fits MIL-STD-1913 Picatinny rails. It also includes an M-LOK mount for alternative mounting options on M-LOK compatible rail systems. Powered by one (1) Streamlight SL-B9rechargeable lithium-ion battery pack or one (1) CR123A battery this tactical light delivers high lumen output for superior visibility in low-light environments. It is perfect for law enforcement military and tactical applications. Specifications for Streamlight ProTac Rail Mount 1L-X USB Pro 850 Lumens LED Weapon Light: Manufacturer: Streamlight Light Output: 850 lumens Bulb Type: LED Battery Type: SL-B9 Lithium Metal Color: Black Beam Distance: 346 m Battery Life: 4.5 hours Water Resistance Level: IP67 Features of Streamlight ProTac Rail Mount 1L-X USB Pro 850 Lumens LED Weapon Light Jack-Cap tail cap offers push-button switch and port for a remote pressure switch. One-handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching from the firearm. Mounts directly to guns with MIL-STD-1913 (Picatinny) rails or M-LOK and M-LOK compatible rail systems. Extensively live fire tested impact-resistant construction. IP67 rated with standard push-button switch installed; waterproof to 1 meter for 30 minutes. IP54 rated with the remote pressure switch installed for water-resistant operation. Package Contents: Streamlight ProTac Rail Mount 1L-X USB Pro 850 Lumens LED Weapon Light Gun Light Jack Cap M-LOK kit momentary switch hardware kit 2.5 mm Allen wrench (1) SL-B9 battery pack USB cord Streamlight 89025: ProTac Rail Mount 1L-X USB Pro 850 Lumens LED Weapon Light Black