... /SD card slot Digital portable Mini speaker for Iphone, computer,CD, MP3 & Mp4 mini speaker, computer speaker, speaker,mini computer speaker ... concept integral stereo portable mobile music, connecting your MP3, MP4, CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, Micro ... audio cable into this hole as antenna.Warm reminder: Voltage must be within 5V-6V,use computer 5V or power adapter ...