1. Function: On the basis of the original pedal, an adjustable auxiliary pedal is added.

2. Reason for modification: The original owner's pedal position cannot be adjusted, and there is no rear footrest for people to rest on their feet.

3. Advantages: The main pedal has 5 new positions to choose from, and the replaceable auxiliary pedal is added. The auxiliary pedal can be folded and anti-skid knurled thread design.