Sound Diffusion Processor: The Sound Diffusion Processor, spreads sound in any space, for richer, more expansive audio 16 Hours of Battery Life: Listen longer with a battery that lasts up to 16 hours, and a convenient battery status indicator IP67 Waterproof and Dustproof Rating: It features waterproof and dustproof with an IP67 rating and new UV coating for extra durability in the elements Bundle Includes: Sony SRS-XB100 Wireless Bluetooth Portable Lightweight Compact Travel Speaker with Strap (Black), and Hard Shell Case Compatible with Sony SRSXB10 and SRSXB12 Speakers Compact Speaker with Versatile Strap: With a specially engineered strap, the super-portable XB100 is easy to travel with. But dont be fooled by the small sizethis compact speaker packs plenty of power