RJ-1900DVX DVD Player + Karaoke + MPEG-4 + Card Reader + USB Full karaoke function 3 switch controls on the front panel for easy adjustment of microphone volume, echo, and delay to render better karaoke sound effects. Form compatibility: DVD/DVD+-R/DVD+-RW/MPEG-4/AVI/XVID/VCD/SVCD/CD/CD-R/CD-RW/JPEG/CD+G USB port to connect and play the files in the MP3 player/flash drive,Supports 4 types of memory cards: SD/MS/MMC/XD Horizontal resolution more than 500 lines