Troubleshooting - Cannot adjust the volume. - Headphones/Earbuds

• For models RP-HD605/RP-HD610: Is the ambient sound enhancer operating? Turn off the ambient sound enhancer.
• The control buttons / multiple function buttons not work when the detachable cord (supplied) is used.

This FAQ applies to models: RP-HD605, RP-HD610, RB-M300, RB-M500, RB-M700