Sony Walkman NW-S21 MP3 player
http://www.docs.sony.com/.../NWS23.pdf
Table of contents
View All 
• Overview »
• What you can do with your Network Walkman »
• Other features »
• Step 1: Checking the package contents »
• Step 2: Inserting the battery »
• Locating controls »
• Front side »
• Rear side »
• Display »
• Basic Operations »
• Transferring audio files from the computer to your Network... »
• Note on playing songs with a limited playing period... »
• Note on playing songs with a limited playing count »
• Listening to music with your Network Walkman »
• What is the Group function »
• On other operations »
• Advanced Operations »
• Repeat mode »
• Selecting the repeat mode »
• Playing the tracks repeatedly (Track Repeat) »
• Playing a specified section repeatedly (A-B Repeat) »
• Playing specified sentences repeatedly (Sentence Repeat) »
• Setting the repeat counts »
• Changing the display mode »
• Selecting the group display mode »
• Adjusting treble and bass (Digital sound preset) »
• Selecting the Sound quality »
• Adjusting the Sound quality »
• Locking the controls (HOLD) »
• Storing non-audio data »
• Adjusting the time setting of your Network Walkman to a... »
• Adjusting the current time setting (DATE-TIME) »
• Limiting the volume (AVLS) »
• Setting the volume using the preset volume function »
• Setting a volume level of the preset mode »
• Switching to the manual mode »
• Turning off the beep sound (BEEP) »
• Changing the backlight setting »
• Other functions »
• Regrouping songs (REGROUP) »
• Formatting memory (FORMAT) »
• Other Information »
• Precautions »
• Troubleshooting »
• To reset the player »
• What happened »
• Messages »
• Specifications »
• Glossary »
• Menu list »
• MP3 File Manager software »
• What you can do with the MP3 File Manager »
• Transferring MP3 audio files from the computer to your... »
• Display of MP3 File Manager »
• Erasing audio file »
• Ordering audio file »
View All