... card and USB FLASH DRIVE. 2.external audio to connect with your mp3,mp4,cd,dvd,mobile phone Features ... directly. It also can be used as external audio to connect with your MP3, MP4, CD, DVD, IPod, phone ... The speaker has external audio output hostile, it can connect headphone or stereo. Note: Three kinds of function are ... supply: 5V/1000mA, ACpower adapter`sPower rotate connect line(can choose)