1. CD/VCD/DVD player 2. USB/SD/MMC slot 3. USB Record MP3 4. Power: AC90-250 Features: Supports digital recording ... to SD card or USB;Supports MPEG4,CD CD+G, VCD,DVD, MP3, MP3+G ... volume , echo for microphones;Additional SD card slot and USB 2.0 port;2microphone inputs with individual volume control; Professional karaoke mixer ...