Q1 is a self-balancing electric unicycle with Twin Wheel which is more powerful, more intelligent and has super portability. This electric segway uses an Intelligent Balancing Chip, with a Changeable Battery, supports 18KPH max speed. The appearance of the gyroscopic electric unicycle is fashionable and unique with the timeless circle curve design. AirWheel Q1 Electric Unicycle Specifications:Max Speed: 18KPH (11MPH)Range: 16-28kmMax Incline: <15 degreeChangeable Battery: 170WHMax Load: 120 kgsCharging Time: 90 minsCharging Voltage: Support AC 220V 50-60HzBattery: 170Wh / Lithium (protection board with SOC equalization)Temperature: -10°C ~ 40°C (best at 20°~30°C