With the use of 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.-Uses XM-L (U2) LED, max 860-lumen output-Powered by 4 CR123A or 2 18650 rechargeable batteries-4 brightness levels and 2 flashlight modes, dual switch in the tail cap-Low-voltage warning function-Digitally-regulated output (maintains constant brightness)-Reverse polarity protection to protect from improper battery installation-Low-voltage warning function to remind users of low power-Toughened ultr-clear glass lens with anti-reflective finish-Intelligent memory circuit which automatically memorizes the brightness level when turned off-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-Made of durable aircraft-grade aluminum, premium Type III hard-anodized finish, scratch resistant and wear resistant-Waterproof to IPX-9 standard-165mm (length) x 44mm (diameter) x 52mm (head)-275 gram weight (excluding batteries)Content of bundle,-Fenix TK35 U2 860 Lumen LED Flashlight-Fenix ARE-C1 Smart Battery Charger-Fenix Car charger adapter for ARE-C1 Charger-Fenix ARB-L2 2600mAh 18650 Li-iOn Rechargeable batteries 2nos-EdisonBrightCR123A Lithium battries 4nos (Non-rechargeable)- Fenix TK35 Flashlight Holster- Fenix lan yard- Fenix Instructions manual- Fenix warranty card