FM Tuner with 40 Presets allows you to program 40 of your favorite FM radio stations. CD-R/RW and MP3 Playback Capability plays CD-R/RW discs with MP3 files burned in either a CD or home recording deck. 5 Direction Control Key Single button control with 5 individual functions providing an easy and convenient way to control music and navigation 12 Playback Modes/Bookmark Playback Function offer many predetermined choices in the playback of CDs, including Normal Play, Group Play, Single Track Play, Shuffle Play, Group Shuffle Play, Bookmark Play and Repeat Play for all play modes Digital Mega Bass(R) Sound uses digital processing technology to produce rich, deep, bass tones with extremely low harmonic distortion 2 Position Automatic Volume Limiter System (AVLS) maintains volume output at levels below distortion threshold for cleaner sound reproduction FM Tuner with 40 Presets CD-R/RW and MP3 Playback Capability Up to 30 hours Battery Life (for MP3 CD)/up to 50 hours for FM Radio (batteries not included) Digital Mega Bass(R) Sound Formats Supported - CD-R/CD-RW with MP3 Audio 20-20000Hz, 1/-2dB Frequency Response Power Battery Indicator Battery Life - Up to 30 Hours (MP3 CD recorded at 128kbps/G-protection with 2 AA Sony Alkaline Battery) / Up to 50 Hours using FM Radio Power Requirements - AA Battery x 2 (1.5V DC)(batteries not included) Output Power - 5 mW + 5 mW (at 16 ohms) 1 (stereo mini jack) Headphone Output 4.5V DC-In Dimensions - 5 5/8 x 5/16x 5 5/8 inch (140 x 32.7 x 140mm) Weight - 7.5 ounces (210 grams)