The main purpose of the footrest is to put the feet firmly on a flat surface. If you sit on an office chair that is larger than suitable for you, there is a good chance that you can not place your feet firmly on the ground. Having your feet hanging will cause no problem: 1) it harms your overall blood circulation and 2) you can’t use the back support of the chair properly. There are several adjustments for typical footrests:
With height adjustment
Movable or lockable angle
Some footrests have a slight massage function
If you have any questions about the pedals, please call 21693337 (Wan Chai) or 21160373 (Kwun Tong).