Features:

1) PC interface supported: USB			

2) Digital formats supported: MP3 / WAV / WMA		

3) Signal-to-noise ratio: 87.2dB			

4) Playback modes: random play			

5) External hard drive function: Yes			

6) Recorder Additional features: variable bit-rate compatible

7) Sound output mode: stereo			

8) Audio Additional features: auto-power off		

9) Earphones type: binaural			

10) Earphones response bandwidth: 20 - 20,000Hz

11) Voice-recording: 7 hours continaully

12) Recharge time: 2 hours continaully clip up lens with contours  that maximize 

      protection against sun, wind and side impact