The shruti box is a hand-pumped wind instrument which provides a drone for singing or playing other instruments. It can produce a single tone or chords. This shruti box has 13 reeds with 13 side mounted controls and integrated bellows.  It has the following tones:
C4, C#4, D4, D#4, E4, F4, F#4, G4, G#4, A4, A#4, B4, C5