Alpatronix C3 Ultra-Portable Mini Capsule Speaker with Enhanced Bass & 3.5mm Audio Jack for Apple iPhone, iPad, iPod, Samsung Galaxy, Nexus, HTC, Blackberry, Nokia, Smartphones, MP3/MP4 Players, Tablet, PC, Laptop [SONPRE EDITION] - (Black)
Just what I needed for my 7&#34; tablet.  Holds a charge and works for a long time.  It's not BOSE or Hi-Fi but, it does what I needed it to do at a decent price.