Use this bike light with horn to give you great value for your money. It is a 2in1 product – a headlight and horn in one. Moreover, it has a built-in rechargeable 1200mAh Lithium battery as its power source. Charge it with the use of the USB cable that comes with the package. Likewise, the lights have 250 lumens while the horn has 120db. This is easy to install and the horn button is separate from the light.