4-way Front-Back & 10-level Height Seat This air bike features a 4-way adjustable seat, which means the seat has front-back adjustment (17 - 21) and 10-level height adjustment (42/41/40/39/38/37/36/35/34/33) to adapt to the use of different groups of people. And the cozy seat is covered with waterproof PVC leather and padded with soft PU foam for ultimate comfort. Air Resistance System Using 8 fan blades as its unique air resistance system, this fan exercise bike provides unlimited resistance for your workout. The faster you ride, the more resistance there is. Meanwhile, the fan will produce cool air while riding. And the double-stage belt and chain drive mechanism ensures smoother ride. Clear LCD Digital Monitor In order to feedback your exercise data in real time, this fan bike is equipped with a clear LCD display, conveniently tracking your time, speed, distance, calorie and total distance. Besides, you can press the mode button for 5 seconds to convert km/h