The HamiltonBuhl HACX-205 Top-Loading CD/MP3 Player with USB is built to deliver the latest audio technology to the classroom in an easy-to-use package. With the ability to play recorded media including CD-R, CD-RW and MP3 files on CD-R and CD-RW media and through the USB port, this media player features 3W amplifier and built-in speaker delivering crisp, clear sound to small groups. Built for long-term use, this classroom-proven and teacher-approved player is a great addition to your classroom. Specifications for HACX-205 CD/MP3 Player: Top-loading CD/MP3 player with USB. Plays:Audio CD, CD-R, CD-RW and MP3 files on CD-R or CD-RW. Plays MP3 files on USB flash drives via built-in USB port. Amplifier and speaker: Built-in 3W. Outputs: 3.5 mm and 1/4" stereo outputs for connecting headphones and jackboxes. Volume control: Digital push button. Track display: Back-lit LCD. Power: 6V wall power adapter or 4 "C" batteries (batteries not Included)