9mph       8miles      250W*2        10"
      -------------------------------------------------------------------------------------------------------------------------------
       Max supported weight : 265 lbs /120 kgs           Minimum weight: 44Ibs/20kgs
       Max speed : Up to 9 mph / 14.4 km/h                Max Distance :  Up to 8 miles /12.8 km
       Battery Voltage:  36V                                         Motor Power : 250W*2
       Battery Capacity: 4.0 Ah (20 Cells)                    Battery type : Rechargeable lithium-ion battery
       Charger：AC100-240V,50/60HZ                       Charging time : Up to 5 h  
       Max Incline :15°