Features: 1 This keyboard sticker is made of high quality transparent PVC by fine technology, and it is transparent and clear on the keys. 2 This sticker is made of environmentally friendly material and can be used repeatedly. It will not retain glue and will not hurt the keys in use. 3 This keyboard sticker is a good helper in getting familiar with the keys quickly, and it can help beginners to quickly cross the initial stage. 4 This sticker can be used for piano, electronic piano, hand…