The TLR-7 Xs Sub features multi-fuel battery capability powered by either one (1) CR123A or one (1) Streamlight SL-B9 lithium-ion rechargeable battery pack, both delivering 500 lumens and 5,000 candela. The integrated rail clamp is designed to rapidly attach/detach from the side of the weapon, providing smooth installation and removal without having to put your hands in front of the muzzle. Features a specialized clamp system for mounting on SIG SAUER P365/XL accessory rails.