||12 holes can play 48 tones. The stainless steel with high hardness changes the sound key, the thickness does not deform, and pushes flexibly. Self - made covering film, with the world's advanced processing technology, so that in any season, it can play without mucous membrane. Clever keys can be played on the top of a harmonica. If the keys are not pressed, playing is equivalent to the piano's white key. When pressed, the keys will be raised to half tone immediately, which is equivalent to the black key. You can play any tune. At the same time, the precision turning round mouth is in line with the human body design, which makes the air flow smooth and full when playing. The reed is made of phosphorous bronze spring with sound and round and solid tone. It is especially suitable for playing classical style and melodious music, and can also play popular music. Black metal cover plate shows elegant and grave, have very strong quality feeling.