Improve Bicycles:bicycles with designs,and close the lid to protect that lens from bumps when not in use. Rotatable: 360 degrees rotating:the balls of this bicycles allows you to it 360 degrees until you adjust your desired direction. High Hardness: Increasing shock resistance,ensures a long service life. The improved shape makes it easier to carry and does not take up much space. Fitting on Both Sides: The bicycles in a is suitable for open handlebars and can be installed on both the left and right side. Suitable for 18-22mm handlebar. Easy to Install: This bicycles should be installed at the end of the handlebar. If you have any questions,please to our.