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Product dimension:22.5x28x6.5cm-Turn almost anything into a boom box with this vibration speaker!-Learn about the science of sound-Make sound waves visible with this awesome device called a vibration speaker. -It turns practically any surface into a larger speaker. -The audio jack connects to standard audio output sockets. -Stick the speaker onto a variety of surfaces and objects to find out which materials produce the best sound.-Experiment to see sound waves ripple through a tray of sand, water, and other substances.-With signal generating apps, you can experiment to visualize different sound wave patterns.