The brush appears when you press a convenient sliding button when it is pushed up from the handle, and after use it retracts down to slide back in and stay clean and protected. It can be stored in your pocket after use without having to worry about a second piece. Thanks to the quality of its materials, with proper use and proper maintenance, it can be reused several times. Instructions for use: 1. Slide the button up to uncover the brush.\ 2. Insert the brush between the teeth. Rotate and move back and forth.\ 3. Use the flexible tip to reach the molars.\ 4. Wash the brush with water after each use.