... sound quality 4.CE/ROHS/FCC 5.OEM Service professional mini mp3 portable speaker1. Small size portable speaker, easy to put ... in your backpack during traveling or exercising2.Compatible with laptop, iPod,MP3,MP4,MP5,cellphone.3. Dynamic bass system ... design, portable, easy to carry.5.In-built lithium battery with high power capacity6.Matching all audio devices. Technical Specification Speaker ...