Suspensions can offer riders with a much smoother riding experience when you are on some bumpy terrains like cobbled road, wood roads such non-paved roads. Compared spring and oil suspension kind, air suspension is more reliable especially when you are riding in cold ambient conditions, less maintenance, and more comfortable.
Depends on which model you buy, you will get wither Sram 9 speed transmission system or Sturmey Archer inner 5 speed gear system with belt drive. These features make sure you will get better control and better riding experience either in PAS mode, throttle or pedal mode. You can choose which gear level based on the riding condition.
*air suspension is standard comes to you standard, vendor maybe various from different model.