1. It is suitable for beginners fingering practice, helping beginner piano friends to quickly and clearly understand the keys, adding staves at the keys, and having color , which helps learners to quickly improve their understanding of the piano 2. According to the real piano key ratio design, it can effectively improve the learning efficiency of beginners on the piano 3. Waterproof, dustproof, anti-ink, can be hand-rolled, no creases, reasonable key spacing, keys 4. Can be used as a piano reference table for students to practice piano, but also for teacher teaching 5. transparent background, clear printing, can greatly improve children's learning interest, get started quickly colour:black & white Material:Coated paper size:122x14cm Package Contents: 1 x piano chord chart Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.