The Streamlight ProTac series expands into weapon-mounted lights with this 350 lumen light featuring a dedicated fixed-mount for Picatinny rails. It uses either a remote switch with momentary/constant on operation or a standard push-button tail switch, and can run on either a lithium battery or an easy-to-find alkaline battery. Multi-function, push-button tactical tail switch or Dual remote pressure switch with latching push button. One handed operation of momentary, variable intensity or strobe mode. TEN-TAP programmable switch allows user selection of one of three different programs: high/strobe (factory default), high only, or low/high. One handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching.