【DISPLAY】Using high-definition display screen, real-time high-definition display of various sports data, such as: speed, time, distance, calories, convenient and intuitive understanding of each data, 【ENERGY SAVING AND ENVIRONMENTAL PROTECTION】Runners move autonomously through the human body, no electricity is needed, more stable and safer, and maintenance costs are close to zero 【SPEED ​​ADJUSTMENT】equipped with 8-speed adjustable design, can efficiently adapt to different running intensity