The YL81F's colorful LCD Display offers a wide range of functions to meet your riding needs, including: USB charging port, battery level display, boost gear adjustment and indication, speed display (including real-time speed, maximum speed, and average speed), mileage display (including single mileage and total mileage), boost push control and indication, headlight control and indication, error code display, cruise control and indication (optional), and personalized parameter settings (such as wheel diameter, speed limit, etc.). personalized parameter settings (e.g., wheel diameter, speed limit, etc.). Factory default parameter restoration function