Two resonant liquid chambers are connected by a long steel spiral. The Galaxy is held in one hand, while the other hand holds a beater, and it may be played something like a classical triangle. By slightly altering the position of the Galaxy, liquid inside the two chambers exerts variable dampening on the thin steel resonator plates. You can tilt it and hold the body or the coil. A truly fascinating instrument. Galaxy is an inspired name for this item. Wide sound spectrum. Includes metal beater. Very good demonstration on YouTube.