USB 2.0 connection for file transfer to/from computer. Used but great working condition. WAV format. Requires 2 x AA batteries. Has expandable storage with micro USB slot (card not included). Supported audio formats: Linear PCM (WAV format) at 16-bit/44.1 kHz (CD quality) or 24-bit/44.1 kHz; Linear PCM (WAV format), 24-bit/48 kHz; Linear PCM (WAV format), 24-bit/96 kHz; Compressed (MP3 format): 32–320 kbit/s at 44.1/48 kHz (VBR files can be played but not recorded).
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