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-OFFUser enabled strobe functionEngineered optic produces a concentrated beam with optimum peripheral illuminationSecurely fits a broad range of weaponsMounts directly to all MIL-STD-1913 (Picatinny) railsLength: 3.39"Width: 1.47"Height: 1.44"Weight: 4.32ozDual Remote Pressure Switch2 x CR123A batteriesMounting ClipsAdhesive PadsCable Ties