... active subwoofer3.Shock, out of your imagination4.Oval low frequency speaker make the bass sound quality more outstanding5. Mini, portable ... your MP3,MP4, CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, Hi-fi speaker,TF-card,U-disk.6.Perfect MID sound ... the music, for your option. Specifications: Work voltage 3.6-4 .2 VStandby current<3mATransmit power Class2 less than 4dbm, low ...