A 600 lumen output and ultra-durable build make the PolyTax X flashlight an all-in-one solution for those looking for a high-powered, travel friendly light built to withstand the elements. This flashlight can be powered by Streamlightâ??s SL-B26 USB rechargeable battery pack, or with two CR123A lithium batteries. TEN-TAP programming allows the choice of three programs for multiple output configurations based on your intended use. High/strobe/low, high only, low/medium/high configurations provide a wide-range of utility and simplicity. An IPX7 waterproof rating and high-impact nylon polymer with stippled texture ensure durability and longevity in virtually any environment.