- Robust plastic music holder with waterproof, tear-resistant construction. It does not deform and protects important music sheets or other paper documents while keeping them organized. - Write directly on the page. Only the upper and lower parts of the sheet are covered. The holder is not reflective, which keeps the sheet clear and reduces fatigue while playing. - Simple USB port and right-angle connection. The hollow design makes it easy to insert and remove the file. It has double springs that allow it to unfold 180 degrees and lay flat on the piano music stand, providing a comfortable viewing angle. - Practical and versatile. Suitable for standard music sheets and other documents, helping you keep readings steady and accessible during practice, rehearsal, or lessons. - Use scenarios: - Piano practice: hold scores, annotate directly on pages, and read comfortably without glare. - Rehearsals: quickly insert new pages, keep sheets flat, and view from a steady angle on the stand. - Teaching: instructor or student can reference and annotate pages during instruction without shifting position.