Nova Mini Portable Speaker By Tego Audio (Black) Loud enough to fill the room, small enough to fit in your pocket Compatible with iPod, iPhone, MP3, MP4, laptop, PC, etc. Plugs into any 3.5mm headphone jack Patented "Bass Chamber" collapses for easy carrying, and expands to boost your music's bass Patented "Daisy Chain" feature allows you to link multiple NOVA speakers, for amplified sound Internal Lithium Ion battery recharges via USB, 8 hour playback time on one full charge