Streamlight ProTac Rail Mount HL-X Laser USB - 1000 Lumens 1000 lumens on high Features an integrated red aiming laser  Multi-fuel – Uses one Streamlight SL-B26™ protected Li-Ion USB rechargeable battery pack; also accepts two CR123A lithium batteries Includes both the remote with momentary/constant on operation and a push-button tail switch Integrated safety circuit protects battery from overcharge/overdischarge