Memory capacity: 64MB/128MB/256MB/512MB play mode :Normal,repeat one, repeat all, shuffle, introduce,play Dir, repeat Dir Music EQ mode: natural , rock, POP, classicl , Jazz, classical, USB 2.0 full speed. Music format: MP1,MP2,MP3,WMA,WMV,ASF,WAV. record format :WAV(32KbPs), ACT(8KbPs) language: Simplified chinese, english, traditional, japanese,kovean ,french, italian, german, spanish, swedish,portuguese, danmark, dutch. FM radio:87MHZ-108MHZ. output frequency: 20HZ-20KHZ. SNR:>=85dB. Battery: AAA*1.5V alkaline battery LINE-IN expansion slot size:80*51*21mm