Custom Printed Vibration Powered Wireless Speaker

• Our Vibration Powered Wireless Speaker uses interaction technology to amplify cell phone sound!
• Simply place any mobile device on top of the speaker and the sound from the internal speaker will amplify.
• Our custom printed speaker is compatible with most smart phones, iPhones, mp3 playes and many other mobile devices!
• Includes AA batteries (not inserted, see below for insertion charges).