Fenix TK35 is a convenient extremely high intensity multifunctional flashlight. Using the Cree XM-L(U2) LED, it can deliver a significantly high output. Offering 4 brightness levels, strobe and hidden functions, it can be powered by the frost-resistant CR123A lithium batteries or large-capacity 18650 rechargeable Li-ion batteries. with the unique batteries holder and the dual switch in the tail cap, the TK35 shows great power in various outdoor activities, such as exploring, camping, searching, caving, etc. Features: Uses XM-L (U2) LED, max 860-lumen output; Powered by 4 CR123A or 2 18650 rechargeable batteries; Low-voltage warning function; Digitally-regulated output (maintains constant brightness); Low-voltage warning function to remind users of low power; Over discharge protection circuit protects the batteries effectively; Patented battery holder made of PC quality material - wear resistant and shock resistant; Max 340 meter long-throwing beam; Waterproof to IPX-9 standard; 165mm (length) x 44mm (diameter) x 52mm (head); and 275 gram weight (excluding batteries).