The Streamlight TLR-1 HL has a 1000 lumen output and can run for up to 1.5 hours. Plus, a further throw distance of 283 meters which is almost unheard of for a weaponlight. With this kit, not only do you get the upgraded Streamlight TLR-1 HL, but you also get the newly designed dual remote pressure switch. The new switch allows for simultaneous or individual activation of the weaponlight and external aiming devices, plus, allows for momentary or constant-on activation. Features: Includes : Momentary/steady ON-OFF User enabled strobe function Engineered optic produces a concentrated beam with optimum peripheral illumination Securely fits a broad range of weapons Mounts directly to all MIL-STD-1913 (Picatinny) rails Length: 3.39" Width: 1.47" Height: 1.44" Weight: 4.32oz Dual Remote Pressure Switch 2 x CR123A batteries Mounting Clips Adhesive Pads Cable Ties