SecurityIng Super Bright 1800 Lumens 3 LEDs Flashlight Extensible Powerful Lighting Torch (18650 Rechargeable Battery Not Included) Super Bright: Adopting 3 CREE XM-L T6 LED bulbs, the output brightness up to 1800Lm. Perfect item for home using or outdoor sports, such as camping, traveling, hiking, cycling, searching. 5 Modes Options: High &gt; Middle &gt; Low &gt; Strobe &gt; SOS. One button operation, easy to operate. Suit for different needs. Indurative & Durable: The body of this flashlight is built of aircraft grade standard Aluminum alloy. Besides, with hard anodized finish, it's anti-abrasive, free-scratch and shock-proof. Extensible Flashlight Tube: Supports flashlight to extend into a 296 millimeters outdoor flashlight. Power Source: Powered by 2 x 18650 3.7V rechargeable battery or 3 x 18650 3.7V rechargeable battery(Not Included). Internal wiring applies constant current output, can utilize the batteries to a maximum extent.