Recording mediamicroSD card (64 MB - 2 GB) microSDHC card (4-32 GB)Recording/playback formatWAV: 44.1/48/96 kHz, 16/24-bit MP3: 44.1/48 kHz, 32/64/96/128/192/256/320 kbpsNumber of channels2 channels (stereo)Analogue audio inputs and outputsMicrophone/Line input3.5-mm stereo mini jack (supporting plug-in power) Input impedance25 kΩNominal input level–20 dBV Maximum input level–4 dBVLine/headphones output3.5-mm stereo mini jack Output impedance12 Ω Nominal output level–14 dBV (10 kΩ load) Maximum output level+2 dBV (10 kΩ load) Maximum output power (phones)20 mW + 20 mW (32 Ω load)Built-in loudspeaker0.3 W (monaural)Other inputs and outputsUSB jackMini-B type FormatUSB 2.0 HIGH SPEED mass storage classAudio performanceFrequency response20 - 20 kHz +1/–3 dB (44.1 kHz, EXT IN to LINE OUT, JEITA) 20 Hz – 22 kHz +1/–3 dB (48 kHz, EXT IN to LINE OUT, JEITA) 20 Hz – 40 kHz +1/–3 dB (96 kHz, EXT IN to LINE OUT, JEITA)Total harmonic distortion0.05 % or less (EXT IN to LINE OUT, Fs 44.1/48/96 kHz, JEITA)S/N ratio92 dB or more (EXT IN to LINE OUT, Fs 44.1/48/96 kHz, JEITA)Note for JEITAConforming to JEITA CP-2150Computer compatibilitySupported OSWindows XP, Windows Vista, Windows 7 Mac OS X 10.2 or later WindowsPentium 300 MHz or faster 128 MB or more memory USB port (USB 2.0 recommended) MacPower PC, iMac, G3, G4 266 MHz or faster 64 MB or more memory USB port (USB 2.0 recommended)Recommended USB host controllerIntel chipsetPower supply and other specificationsPower supplyTwo AA batteries (Alkaline or Ni-MH) USB bus power supplied from a computer
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