Comes with a set - The bike lights front and back making your bike stand out with unmatched 360° visibility, ensure your safety in the dark. Different Lighting Modes - You can easily cycle through the lighting modes of the bike light by pressing the ON/OFF button. The rear light also have 6 lighting modes to play a warning role. USB Rechargeable - This bicycle light is powered by a built-in rechargeable battery, you can charge the bike headlight by the USB charging cable (included). This bike light only takes 3.5 hours to fully charge, and the battery can ensure you use up to 8 hours in strobe mode. Easy To Assemble - The led bike light can be used in various night activities, such as running, jogging, hiking, camping, walking your dog, cycling, changing tires, power outage and more. It can be easily install and disassemble, no extra tool required. Useful Battery Indicator - This bike headlight is equipped with a LED battery indicator, you can see the remaining power clearly. The indicator red when charging, and it turns to stay on green when the light is fully charged, which makes the charging progress of the bike light more convenient. Bike Lights Set 1500LM USB Rechargeable Bicycle Headlight & Tail Light Waterproof 5 Lighting Modes Fits All Bicycles for Road and Mountain(cool black)