Panasonic SL-CT680V Portable CD/MP3 Player with Digital AM/FM Tuner Personal CD player with anti-skip protection and digital AM/FM tuner Supports CD, CD-R/RW, and MP3 formats; 5 equalizer presets for varied sound D.sound technology reduces distortion, boosts the bass, and restores lost MP3 fidelity Plays up to 141 hours (MP3) or 75 hours (CD) on 2 AA and 2 AAA batteries Includes external battery case and high-end stereo headphones; 5.48 x 0.81 x 5.48 inches (W x H x D)