Mouth harp
The Jew's harp, also known as the jaw harp, mouth harp, Ozark harp or juice harp, is a lamellophone instrument, consisting of a flexible metal or bamboo tongue or reed attached to a frame. The tongue/reed is placed in the performer's mouth and plucked with the finger to produce a note. Each instrument produces one pitch only, with its multiples (overtones), though different sized instruments provide different pitches. There is no standard pitch.