The Fenix TK30 white laser light boasts an incredible effective range of nearly 3/4 of a mile (3,900 ft/1200 meters). The TK30's exceptionally long visibility is enabled by a white laser light source that produces an amazing 363,866 candela output in a precisely focused beam. This flashlight incorporates a battery level indicator and dual switch for effortless operation through the high, low, and strobe modes. It runs on a powerful 21700 5000 mAh battery that can be recharged with its own built-in USB port. The TK30 will operate for approximately three hours in high mode (producing 363,866 candela) and around six hours in low mode (producing 89,600 candela).