Portable battery box * Built in battery,can supply 3.5-4 hours. \"*ElectricGuitar slot and two wired microphones inpu t and one wireless microphones \" * With two wired microphones input Support CD,CD-R,CD-RW ,CD+RW , JPEG,MP3,WMA,MPEG4,DIVX versions 4 to 5 *USB/SD/MMC reader *Guitar volume adj/MIC volume adjustment * FM function * External power 12V. *AUX and av out function *Single 7 segment equalizing regulation 12V/12A and 12V/4.5A \"a) Remote control b) POWER LINE c) One wireless microphones d) Changer LINE e) User manual\"