| Why does the earphone cause static electricity? | COWON J3 | 2010/06/16 |
| Characters on the display are corrupted. | COWON J3 | 2010/06/16 |
| How can I adjust Playback speed? | COWON J3 | 2010/06/16 |
| Does COWON J3 support SD card? | COWON J3 | 2010/06/16 |
| Does COWON J3 support TV out? | COWON J3 | 2010/06/16 |
| TV out is not working. | COWON J3 | 2010/06/16 |
| How many files and folders are recognized by COWON J3? | COWON J3 | 2010/06/16 |
| How long are continuous playback hours of COWON J3? | COWON J3 | 2010/06/16 |