Manufacturers recommend that you do not purchase electric powered solutions from sellers without this certification. -sleek ride. The E22 PRO contains a single shock with the rear suspension even so the ride really seems smoother that the ride on my more expensive E Scooter with dual suspension. five miles https://www.electricscooter.ltd/haibadz-electric-mobility-handicapped-electric-scooter-2-wheel-for-adults/