One side is made of goat skin, and the other side is made of transparent synthetic leather. The sound quality comes with a mixing effect. The goat skin sound is loud and powerful, while the transparent leather sound is delicate. In a wave drum, it produces two completely different sound colors, which can simulate the surging and surging waves hitting the reef, or the gentle waves brushing the shore, allowing you to feel the atmosphere of the ocean even in the city.You can use it on Sound healing and meditation, prayer, buddhist, yoga, stress reduction, balancing body chakra, adjusting our emotional state and so on.Music therapy can enhance our attention, creativity, memory, cognitive integration ability, help us reduce anxiety, and relieve work pressure.