1. No glue, no sticking: The piano note strips are made of silicone, connected in series, so there is no need to stick on the keys like piano stickers. Easy to install and easy to remove without leaving any residue, keeping your keyboard clean and tidy.2. Dual stave display: Displaying notes for each key with a double stave helps to find the corresponding key from the keyboard faster, since all piano scores use treble and bass clef structures.3. Suitable for Beginners: You don't need to know the names of the keys or the location of middle C, just place the note strips on the piano keyboard. complete in seconds4. Delete at any time, reuse at any time: When you start to understand the keys and get familiar with the octave rules, you can delete note strips from the keyboard. Of course, if you feel that you are not skilled enough, you can always put it back.5. 88-Key Full Size: Fits a standard size 88-key piano. Ideal for grand pianos, upright pianos, 88-key digital pianos, and keyboards. Some non-standard size 61/54/49/37 key keyboard instruments may not fit properly. Please confirm your keyboard size before purchasing, especially the gap width between the top of the black keys and the keyboard case, must be greater than 2.4 mm (0.1 inch).Package Included:1 x Piano Note Guide