Hornbostel - Sachs
True board zithers with resonator box (box zither)
One or more strings are stretched between fixed points. The string bearer is a rigid board, with a box-shaped resonator made of slats which is not integral and can be detached without destroying the sound-producing apparatus. The plane of the strings is parallel with that of the string bearer. Sounded by the bare fingers.
True board zithers with resonator box (box zither) sounded by the bare fingers