Model: BTM-04 Efficient up to 70% of transaxle output, auto shift to ... stay idle. Product Name:CE Electric Mobility Scooter(BTM-04) Model: BTM-04 Color: All kinds of color Specification: Weight capacity: ... between wheels: 454mm/17.87" Distance between axles: 890mm/35.04 Climbing capability: 12 degree Turning radius(min): 1300mm/51.18 ... to save energy when stay idle. Electric Mobility Scooter(BTM-04)