Built to deliver the latest audio technology to the classroom in an easy-to-use package. The CD player handles recordable media including CD-R and CD-RW as well as play back MP3 files through the USB port. The 3W amplifier and built-in speaker deliver clear sound to small groups. This CD player is a great way to give audio and music lessons to students of all ages. Runs on 6V wall power adapter or 4 "C" batteries (not included).