Interface: Mini USB, 3.5mm; MP3: 8~48KHz, 8~320kps; WMA: 32~48KHz, 48~192kps; Recording: low quality: 64kps, high quality: 192kps; Earphone output: 10+10mW (320ohm); Frequency: 20Hz~20KHz; SNR: >70dB; Distortion: 0.05%; Working temperature: -5~40'C; OS: Windows 98 Second Edition / Millennium Edition / 2000 / xp