NITEYE By JETBeam perfect kit for your bike - includes all you need - battery, mount and usb-cable and some other small stuff :-) Specially designed for all kinds of riding LUMINUS SST-40 N4 BC LED with a lifespan of 50,000 hours Max output of 1380 lumens and throw distance of 240 meters with one 21700 battery Convenient single side switch for easy access to the five brightness levels and hidden strobe Built-in USB type-C charging port Built-in over-charge and over-discharge protection to ensure safe charging Low power indicator LED reminds the user of battery replacement and remaining power level Low power protection system to protect battery Reverse polarity protection to prevent damage caused by improper battery insertion Quick-release bicycle mount allows mounting/ dismounting of the light Made of aluminum alloy with excellent heat dissipation Waterproof rating: IPX-8 Specifications LED: SST40 Maximum output: 1380 lumens Reflector: SMO Glass: Coated mineral glass Body material: Aero grade aluminum alloy Finish: HA III military grade hard-anodized Battery: 1*21700;1*18650;2*CR123A Switch: Convenient Single Side Switch Length: 126.6mm Head diameter: 31.5mm Weight: 100.5g (without battery and bike mount)