The Streamlight PolyTac X is a 600-lumen tactical flashlight built for extreme durability and a secure grip. Constructed from high-impact black nylon polymer, the 5.46-inch body is waterproof and features an O-ring sealed glass lens. This versatile dual-fuel system is compatible with the SL-B26 protected Li-Ion rechargeable battery or two CR123A lithium cells (included). It utilizes TEN-TAP Programming, allowing users to select between three distinct operating modes: High/Strobe/Low, High Only, or Low/Medium/High. Weighing 4.40 oz, it delivers a 205-meter beam and includes a removable pocket clip. Note: While the technical list mentions AAA batteries and a lanyard, this model is correctly powered by CR123A or SL-B26 batteries for professional-grade performance.