① This speed is measured under75kg of the human body, maximum speed can up to 18km / h
② Endurance mileage is 25℃, 75kg load, Riding at an even speed with 12km per hour, measured under flat road. Riding habit, environment,temp., road condition, load and other factors will affect the endurance mileage.
③ Charging time varies with the ambient temperature and the battery capacity that may change in the course of time.
④ The USB interface could be used to charge the smart phone.
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