Hohner Chromonica Harmonica
This exceptional chromatic harmonica is hand made by the Hohner company. This professional instrument has 10 oversize holes, each of which can play 2 different notes - 1 by blowing, the other by drawing, just like a normal harmonica. However, there is a lever on the right side of the instrument which will allow you to play the notes that are 'missing' from the C scale.
When you depress the lever, the note that you are playing automatically goes up one half step. A 'c' becomes 'c sharp', and an 'f' becomes 'f sharp', etc. The lever is spring-loaded, so that releasing it instantly returns your harmonica to its original key. After you've played this instrument for a few minutes, you'll wonder why ALL harmonicas aren't built this way! (This instrument is available in the key of C and in the key of G.)