Special C Flute w/B,Bb Tuning slide

We always think flute is easier instruments then clarinet and trumpet.but in school band, because most wind instrument are key of Bb, then flute have to follow then play in Bb. so flute became difficult instruments. BerkeleyWind invent this first one in the world can play Bb and C flute. so from today in your class. just need one book. trumpet clarinet and flute can just same book. because this flute come with extra tuning pipe. but have to let you know before you buy this flute. it's still have little out the tune in low note.but better for student to catch with other horn.