Your favorite tunes go where you go with the SRS-XB01 EXTRA BASS Portable Bluetooth Speaker from Sony. Meant to be your audio companion, this ultra-compact speaker is sized small enough to throw into most bags, or attach to them. The stylish, two-tone design matches an included strap that you can use to hang the XB01 anywhere you want to enjoy your music. The XB01 might be small in size, but it's designed to provide big sound with a full-range 1.5" speaker and Sony's EXTRA BASS technology for an extra low-end boost.