1. Rear seat lengthening and strong anti-pressure body structure, extra safety. 

  2. Four-wheel stable balance design, with limitation to 135 degrees of steering, enhancing the safety and stability of the riding process.

  3. Wheels use non-toxic tasteless rubber elastic foam, wear-resistant, with shock and noise absorption. 

  4. Ergonomic seat rounded chamfer, no sharp in overall shape, anti-bump.