... .Good price tf micro sd music player fm radio usb mini speaker 1)The mini audio ... box with new concept integral stereo portable mobile music, connecting your MP3, MP4 ... , CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, etc.2) This digital speaker ... ratio of power amplifier:>=80db 4) Loud Speaker: 1.77 inch (external diameter 45mm), ...