1.with 360-degree surround sound technology, y280 enjoys an impressively power sound be free bluetooth play.
2.very easy to use, with a handle, you can hang it everywhere and that's really free hands.
3.high capacity battery for up to 12 hours of continuous playing time on a full charge.
4.4000 mah battery can be charged, keep mobile phone active when outdoor emergency.
5.y820 has an audio cable with a 3.5mm jack that can be connected to a computer for use as a speaker.