- Simple USB port and right angle connection. The hollow design makes it easy to insert and remove the file. It has double springs that unfold 180 degrees and lay flat on the piano music stand, providing a comfortable viewing angle. - Write directly on the page. This allows you to annotate directly on the sheet. Only the upper and lower parts of the sheet are covered, and the music holder is not reflective, which keeps the sheet clear and helps reduce fatigue during playing. - Robust construction. The music holder is made of plastic, offering a robust, waterproof and tear-resistant build. It does not deform and can easily organize and protect important music sheets or other paper documents. Use scenarios - Piano practice at home. Place program notes, sheet music, or practice scores on the holder, unfold it to a flat position on the piano stand, and annotate directly on the pages as you work through passages. - Rehearsal or live performance. Use on a piano or keyboard stand to keep music at a comfortable viewing angle, while keeping sheets organized, protected, and easy to annotate during run-throughs or concerts. - Classroom, lessons, or tutoring. Ideal for teachers or students to hold worksheets, handouts, or music sheets, while writing notes directly on the page and maintaining clear visibility without glare.