If you value the stability of your mobility scooter, then the 4Fast is made for you. With four wheels under this mobility scooter, you need not fear instability. Even at the maximum speed of 25 km/h, you can ride safely and stably. With a range of 40 km per battery, you won’t have to worry about whether you can reach the local supermarket or any other destination. Moreover, the driving range can be increased by expanding the battery pack.