1000 Lumen weapon rail mount flashlight. White LED technology, impervious to shock with a 50,000 hour lifetime; TIR optic produces a concentrated beam with optimum peripheral illumination. TEN-TAP Programming: Choice of three operating modes: 1. Low/high. Remote pressure switch features momentary and “constant on” operation. Integrated rail clamp attaches to MIL-STD-1913 rails, easy to attach, secure mounting.