Streamlight ProTac Rail Mount 1L-X USB Pro Features The Streamlight ProTac Rail Mount 1L-X USB Pro runs TEN-TAP programming letting the user select between high and strobe as the factory default high only or a low to high sequence to match the task at hand. On the included SL-B9 rechargeable battery pack it delivers 850 lumens and 30 000 candela for a 346 meter beam or steps down to a 100 lumen low setting that stretches runtime to 4.5 hours and the light also accepts a CR123A lithium battery for backup power in the field. The Jack-Cap tailcap is the standout feature combining a multi function push button switch with a dedicated port for an included momentary remote pressure switch so the operator can choose direct activation or remote control without swapping hardware. A one handed snap on mounting interface keeps hands clear of the muzzle when attaching or detaching the light from the rail. Built from 6000 series machined aircraft aluminum with a black anodized finish the light is rated IP67 waterproof to one meter for 30 minutes with the push button switch installed and IP54 when the remote pressure switch is in place. High temperature shock mounted anti-reflective coated Boroflex glass protects the lens from impact during hard use. The light mounts directly to MIL-STD-1913 Picatinny rails and ships with an M-LOK mount for alternative rail systems along with the remote pressure switch hardware kit and a 2.5mm Allen wrench. At roughly 5.6 ounces the Streamlight ProTac Rail Mount 1L-X USB Pro adds serious output without adding meaningful weight to a rifle or carbine build. Streamlight ProTac Rail Mount 1L-X USB Pro Specifications Manufacturer: Streamlight Model: ProTac Rail Mount 1L-X USB Pro Type: Weapon Light Compatible Hosts: 1913 Picatinny Rail M-LOK Color: Black Finish: Anodized Material: Aluminum Light Output: 850 Lumens / 30 000 Candela Low Output: 100 Lumens Max Distance: 346 Meters Battery Type: SL-B9 Rechargeable / CR123A Run Time: 0.5-4.5 hrs Waterproof Rating: IP67 Length: 4.64 Weight: 5.6 oz Available At: GrabAGun