30 hours playback. MP3 playback. Jog proof. Size (H)11.4, (W)11.4, (D)3.7cm FM digital tuner with 40 station presets. Requires 2 x AA batteries (not supplied). In ear headphones (supplied). CD-RW playback. Repeat and shuffle functions. Anti shock. Digital megabass. 1 line display. ID3 tag.