1. After Power on, it go straight to Voice record mode
2. Only one concealed button at the back of pen
3. No flash lights during recording
4. Super thin, largest diameter is only 13.9mm
5. MP3 playing function(Optional)
6. Normal pen, rechangeable refill
7. USB2.0 Mass storage up to 1GB / 2GB / 4GB  
8. Recording in WAV format or MP3 format