As cool to use as it is handy, this device turns solid surfaces into speakers! Just connect to your MP3 player, iPod, computer or other audio player; set the speaker on a table, desk or countertop, and enjoy sound so vibrant, it defies logic. Not only is it a cool device, but it's handy, too—you won't need to lug around bulky speakers to enjoy great sound without earbuds. It's done through surface resonance technology, delivering sound waves through solid surfaces with amazing results (sound varies by surface type). Speaker comes with a built-in FM radio tuner and remote control (uses a button battery, included), and it also has a micro SD card slot and USB port. Charge the speaker's built-in battery through a computer or USB-powered device (cable included). 2" diam. x 2 1/4" h. Available only in multi.