The Meinl Sonic Energy Wave Drums create the soothing sounds of the surf. A sealable filling port allows you to control the number of inside (the more the louder). Hold the instrument flat and move it gently from left to right to enjoy the beautiful ocean sounds. You will immediately feel like you are on sea vacation. The Wave Drum is perfect for meditation, yoga, relaxation exercises, sound healing sessions, and as a percussive effect instrument.