... 8G of extended TF card, and max 8G of built-in flash memory·Support 19 languages: English, Japanese, Korean, French, German ... .·Music format: MP1,MP2,MP3,WMA,WMV,ASF,WAV·Built-in Battery : Polymer lithium/ 3.7V / 100mAh·Speaker power: 0.25W ... ·Supported operating system: Windows,Mac OS,Linux·Record format: WAV(32K bps),ACT(8K bps)·Record time: 210 hours(ACT,1G Flash)·Charging ...