This is a great tool for calming and relaxing. Multicolour LED mimic the movement of ocean waves and It is also has a small stereo speaker, allowing you to enjoy the beautiful environment. Plug your iPod, MP3, Smartphone, etc. into the built-in stereo speaker to complement the serene atmosphere with relaxing music.
Power: 5V DC Adapter (included) or via USB plug (included). Can also be powered by 4 "AA" batteries (not included)