COWIN Qbeat Vibrating Portable Bluetooth, 4.0 Vibration Speaker with Heavy Duty Aluminum Shell and Patented Suction Cup Stander SOUND WITHOUT SPEAKERS. The vibrate unit could change almost any flat-solid surface into a resonance speaker. Thanks to the enhanced magnetostrictive vibration tech,music could be played on any surfaces like tables,chairs,doors,windows,and walls YOU DECIDE WHAT IT SOUNDS LIKE. The sound generated from the surface disperses as a flat field through the panel. Meaning all people in front of the panel or surface will hear the same immersive surround sound at the same volume level. Outputting a wide range of frequencies from 30Hz to 20KHz,depending on resonant surface you tape on SURFACE SUITABILITY AND MATERIAL SENSITIVITY. *Materials such as stone, cement, tile on a solid floor, block, brick and cast cement structures cannot emit sound. *The best materials that can be turned into a panel speaker include: wood, MDF and all sheet woods, glass, plastic sheet (acrylic/polycarbonate) over 6mm in thickness BRING BENEFITS TO THE FOLLOWING OCCASTIONS: Retail Store Promotions,Digital Signage,Home Cinema,Museum,Galleries,Outdoor,Marine, Hotels, Bars, Clubs and Restaurants,Offices,Bath Room,etc. TRY IT, And you will get a different way playing music.