The seller has this to say: Dear customer, if you receive the product and are not satisfied with it, please communicate with us directly and do not leave bad comments easily. This will affect our after-sales service for you. We have a strong customer service team and professional service attitude. Please trust us and we will handle all after-sales services for you. Thank you.

Instructions: Dear customer, after you receive the product, please directly connect the headlight interface to the main line interface for use. It is powered by the battery of the electric bicycle, and the light is turned on through the switch. For the upgraded version of the switch, the distance of the light can be adjusted through the buttons on the handlebar. If you encounter that the light cannot be turned on, it may be due to incorrect operation. Please contact our store staff in time. Thank you.