Features and functions: 1.8inch TFT-LCD screen display MP3/WMA/WMV/WAV playback MP4 function, supporting SMV format movie playing No driver Program necessary under win2000/XP/ME 128MB/256MB/512MB/1GB/2GB(max.) Portable USB data storage Equalizer: 5 modes. A-B repeat function Line-in function FM radio(Optional) High-quality digital recording Built in HI-FI 2.1 channel amplifier (with perfect and loudly-enough audio quality,which is absolutely your best music-lover when traveling,camping or at home) ID3 tag support with file name lyrics display (edit in advance needed) Built-in rechargeable lithium-ion battery ,18 hours' music playback With SD card reader function (max.2GB supported) Solution: Sigmatel Power: 2 W ( single loudspeaker output) Flash memory: 128MB/256MB/512MB/1GB /2GB(max.) Unit Dimensions: 185x56x61mm