() is the Vietnamese name of a traditional musical instrument widely used by the minority ethnic groups of Vietnam (including the Jrai ""). It was derived from the mouth harp of the Hmong people.
An inward-orientated lamellophone, the is a noncomposite brass mouth harp. Unlike the jaw harp, which is held against the teeth while being played, the is held against the lips while the lamella is plucked. This gives much more flexibility to the player, leaving them freer to shape their oral cavity as a resonance chamber to amplify the instrument. It is often enclosed in a wooden or bamboo box when stored.