Olympus VN-3100 Digital Voice Recorder. Recording modes: XHQ/HQ/SP/LP, Frequency range: 16.0kHz (300Hz ~ 7.2kHz). Internal memory: 128 MB. Recording battery life: 25 h. Weight: 63 g. Dimensions (WxDxH): 102 x 39 x 19.5 mm, Battery type: AAA, File type: CELP/ADPCM