Mighty Dwarf 26W Vibration Speaker - Black
There are three vibration speakers: ones that have a broader base and a narrow or regular top [[ASIN:B00JZT6JZ2 CableWholesale Bluetooth 4.0 Portable Vibration Induction Sound Speaker for Smart Phone/Tablets/MP3 Players (5002-40100)]]; ones that have the same base and top (a cylinder shape) and come with a built-in FM receiver; and then there is this a little bit longer cylinder job.  The first two get power from a USB cord and the last is an AC plug in.  The first is good, but lacks the remote control and 