... Good quality 3.Fast delivery 4.Good price Hign quality Micro SD/TF usb mp3 speaker ... box 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 ... of power amplifier:>=80db 4) Loud Speaker: 1.77 inch (external diameter 45mm ...