1. If you are fractured, injured by a fall, in the poor health condition, or reaction slowly, please don't use it.
2. If you don't have enough warm-up exercise, please don't play it. Step by step in case get injured when you fall down.
3. Please don't repair, refit or disassemble it by yourself. If you have any questions, please contact with the seller or the center of customers' service.
4. Cleaning up the dust and the place of soaking with cloth after using it.
5. Please use it in these place:
Lane: prohibition in the place where the vehicle is hard to stop or near the corner of street and other place.
Prohibition in the soft place floor and ground: for example grasslands or paved with carpet, it as is too soft to support1Spring working.
Slope and stair: please don't play in the narrow and slope place, you may be fall down or hurt the others.
Don't use it in the place of obstacle please.