There are four gears, which are
1. Parallel gear is suitable for watching TV and movies while walking
2. High gears can be used to train the backward curvature of the spine
3. Prevent gear shifting to prevent excessive looking down at your phone, playing games, etc
4 storage gears are flat and easy to place
1. Parallel gear is suitable for watching TV and movies while walking
2. High gears can be used to train the backward curvature of the spine
3. Prevent gear shifting to prevent excessive looking down at your phone, playing games, etc
4 storage gears are flat and easy to place
