Sony SRS-XB100 Wireless Bluetooth Portable Lightweight Compact Travel Speaker with Strap (Black) Enjoy big sound with the super-compact Sony SRS-XB100 Wireless Speaker, offering powerful, clear sound, an updated IP67 waterproof and dustproof design, and up to 16 hours of battery life. Small enough to fit in a bag or cup holder, the XB100 also features a versatile strap to take with you wherever you go. | Sony | | SRS-XB100 Wireless Bluetooth Portable Speaker with Case Bundle | Black | Best Buy