The electricity station provides the uninterrupted power for its radar and warning lights. The radar detects the location and speed of the rear objects within 10 meters sector during riding. These data will be transmitted to the computer to predict the movement of rear objects upon the path by 3 different lights to inform the rider to read the road condition. They will have more time to deal with the next movement upon their riding. Silence is a bike helps to keep out the dangerous for any riders. It is also the best partner of deaf rider.