COMPACT SPEAKER WITH VERASTILE STRAP: With a specially engineered strap, the super-portable XB100 is easy to travel with. Sony SRS-XB100 Wireless Bluetooth Portable Lightweight Super-Compact Travel Speaker, Durable IP67 Waterproof & Dustproof Shower Speaker, 16 Hour Battery, Versatile Strap, & Hands-free Calling, Black, NEW, OPEN BOX.