Specification: Size:21 inches vacuum tyre Max Speed:18KM/H(Alarm 12KM/H) Max Load:150KG Cruising Distance:40-45KM,depends on the weight of rider, road conditions anambient temperature. Tire size:360mm Vacuum Tire Electric Unicycle Weight:65KG Super Motor Power:2000W*2 Voltage:60V Battery:72V 11Ah Lead-acid battery.(Li-ion Battery opitional) Working Temperature:-10-40degree(Best 10-30degree) Charging Time:4-6Hours Dimensions:height 52*83*122cm Pedal distance from the earth:112MM (1)With LED Lighting (2)With Bluetooth Speaker (3)With Controller to controll the speed.20KM/Hour 12KM/Hour,8KM/Hour for choice (4)Controller can control the Lock. (5)Controller can control the LED lighting and Speaker music display (6)With LCD display the battery (7)Big Tire 21Inch