HamiltonBuhl Top-Loading Portable Classroom CD Player with USB and MP3 Supports CD, CD-R & CD-RW Playback. Built-In USB Port for Playing MP3 Files. Backlit LCD Track Display. Built-In 3W Amplifier & Speaker CD Anti-Skip Technology. Equipped with 1/8" & 1/4" Stereo Outputs Digital Push-Button Volume Control. Runs on 6V Wall Power Adapter. Runs on 4 x C Batteries (Not Included) Great for Small Groups & Music Lessons