... /SD card slot Digital portable Mini speaker for Iphone, computer,CD, MP3 & Mp4 mini speaker, computer speaker, speaker,mini computer ... concept integral stereo portable mobile music, connecting your MP3, MP4, CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, ... :?80Db*Loud Speaker: 1.77 inch (external diameter 45mm), Magnetic resistant 4 Ohms*Power supply: 5V/1000mA AC power adapter ...