The touch sensor, stereo sound, Bluetooth, or noise canceling features are not working correctly, or the headphones suddenly turn off.

The IR sensor, which is located near the charging port on each earbud, detects the condition in which the earbuds are being worn. If the earbuds are not properly worn, the touch sensor may not work, there may be no sound, you may hear only non-stereo sound, the noise canceling function may not work, or you may lose the Bluetooth connection.

Both earbuds must be properly worn. When the IR sensor cannot detect one or both earbuds, such as when they are worn too loosely, the earbud tips are not attached properly, or the IR sensor is dirty, the following issues may occur:

• The touch sensor does not work on the earbud that is not detected
• The earbud that is not detected turns off after 15 minutes due to the Automatic Power Off function
• When only one of the earbuds is detected, sound is heard from both earbuds, but the sound output becomes monaural (non-stereo)
• When only one of the earbuds is detected, the Ambient Sound Mode will work only with the detected earbud
• When neither of the earbuds are detected, the Ambient Sound Mode turns off

Note: These issues are based on the default settings. If you customize the settings, the issues may differ.

If any of these issues occur, try the following:

• To make sure the earbuds are properly fit to your ears, refer to the How to wear the headphones properly and select most suitable earbud tips article
• Clean the IR sensor using a dry, soft cloth.
• If the issue still occurs, turn off the Automatic Power Off function in the Sony | Headphones Connect app. With this setting off, the wearing detection function is disabled.

If the issue is still not resolved:

Refer to the Headphones Troubleshooting Guide, select your issue and follow each solution.