Bestbuy offers Sonos - Roam SL Portable Bluetooth Wireless Speaker - Shadow Black for $99.99 (orig. $159) free shipping.

Product Description:
Sonos Roam SL allows the user to enjoy hours of music, radio,audiobooks, and more from all your favorite services thanks to thelong-lasting rechargeable battery. Listen at home with WiFi and easilycontrol the sound with the Sonos app, and stream with Bluetooth®everywhere else. Add more Sonos speakers around your home for multiroomlistening. Everything works together over WiFi.