The ProTac® Rail Mount HL-X is a 1,000 lumen weapon-mounted light featuring a fixed mount for MIL-STD-1913 (Picatinny) rails or with the included M-LOK® mount allowing for alternative mounting options to M-LOK® and M-LOK® compatible rail systems. It uses either a remote pressure switch or a standard push-button tail cap switch, and can run on multiple battery types. TEN-TAP® Programming allows for selection of three different operating programs: 1) high/strobe 2) high only 3) low/high. Multi-Fuel: Uses one (1) Streamlight SL-B26® protected Li-Ion USB rechargeable battery pack; also accepts two (2) CR123A lithium batteries.