... Portable Mini Speaker 1)Mini speaker for iPod 2)360degree surround sound 3)On/off switch 4)Print your logo on shell 2012 newest mini speaker ... :180Hz-20kHz• S/N:more than 80DB• Speaker:40Hm,φ40mm• Line input:φ3.5mm• Battery ... Charging Voltage:4.2-5V• Power Input:Mini USB(5V/500ma)• Charging Time:About 3 hours ... ,randonm music)• Audio Source:PC,MP3,MP4,MD,CD,DVD player,Mobile phone,etc • Mini Speaker*1• ...