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This is a Test video, please do NOT imitate. Assemble both brake while riding. The brake will be activated when you ride automatically. Without any hydraulic, pneumatic, and electric power in the device. The brake works better than the car one, has frequency brake. and for frequency brake will have long tern brake distance. For SABS, on the contrary, the distance is shorter than the original brake system. Try it, and you will feel the safety while you are riding.