... :more than 80DB• Speaker:40Hm,φ40mm• Line input:φ3.5mm• Battery Voltage:3.7V• Rating Power:2W• Color:Black,Red,White ... :Mini USB(5V/500ma)• Charging Time:About 3 hours• Li Battery Capacity:400mah• Working time about 10hours(medium volume,randonm music ... )• Audio Source:PC,MP3,MP4,MD,CD,DVD player,Mobile phone,etc • Mini Speaker*1• USB Cable with 3.5mm Audio ...