It is a set of two small drums on a pole.
To play the nodo, the pole is twisted, which causes the leather strap attached to the ring of the drum to hit the drum and make a sound.
[1] It is used in Korean ritual and court music.
[1] The nogo, which is similar to the Nodo, has two larger drums and is used in the same ceremonies.
[1] It is effectively a four-sided drum and is used for ancestral rites.