The TLR-8 X G sub rail-mounted light accepts either a CR123A lithium battery or Streamlight's SL-B9 USB rechargeable protected lithium-ion battery pack. Interchangeable rear paddle switches accommodate your shooting style. FeaturesMulti-fuel: Uses (1) CR123A lithium battery (included) or (1) Streamlight SL-B9 protected Li-Ion USB-C rechargeable battery pack500 lumens; 5,000 candela; 141m beam; runs 1.5 hours (CR123A), runs 1 hour (SL-B9)Laser mode runs 11 hoursAmbidextrous rear paddle switches with HIGH and LOW optionsSafe-off feature prevents accidental activation; saves batteriesRail grip clamp securely attaches/detaches without putting your hands in front of the muzzleDurable, anodized machined aluminum constructionUser-enabled strobe functionSecurely attaches to select subcompact handguns: GLOCK 43X MOS/48 MOS and GLOCK 43X RAIL/48 RAIL, SIG SAUER P365 and P365 XL (closed rail systems), and the Springfield Armory Hellcat - as well as select 1913 short railed subcompact...