... CE,ROHS,FCC 4.5200 mAh high capacity 2012 new design External USB power bank for cellphone Specification: Brand nameDenkoModel ... 2,lnsert your 3.5mm plug into your mobile device 3,Turn up the volume no less than 90 ... %. 4,Press the Play button on your mobile device to activate this and music will be played in ... the music CE,ROHS,FCC Certification: 2012 new design External USB power bank for cellphone