Whenever I started talking while wearing these, I could feel the cancelling effect lift a little, allowing me to hear what I was saying without issue. Use a Q-tip with a bit of rubbing alcohol to gently clean the metal mesh filter under the rubber ear tips. If the indicators on the charging case don't light up, please check whether the charging case and earbuds are properly connected, have enough power, and you can clean the charging pins with a dry cloth. You will hear a pairing prompt tone, indicating that the earbuds have entered multipoint pairing status. Make sure the charging case has enough power, and the ear tips are not blocking the charging pins on the earbuds.

Please note that this doesn't necessarily mean there is an issue with the earbuds but may have something to do with the connected device and environment. Try different types of music and turn up the volume on the connected device to see if it helps at all. Charge the charging case with a different charging cable and wall charger and make sure the charging case has enough power. If you still can't connect using the steps above, provide the mobile phone model, app version, screenshots in Step 5, mobile phone system region, and language settings.If there is a pop-up window to confirm pairing for "soundcore Liberty 4 NC," please select "pair" If you accidentally select "cancel" you need to refresh (turn off and turn on) the Bluetooth of your device and pair the earbuds again. Ensure that the audio output device selected is "Liberty 4 NC" on the connected device and turn up the volume on your device. The battery is good, it lasts a long time, the noise quality is great and it let's you pick pre-set sound or customised. Soundcore has a variety of high-quality headphones and earbuds, and the Liberty 4 NC is a great demonstration of that.

Use a dry cloth/cotton swab with rubbing alcohol to clean the charging pins in the charging case and on the earbuds to ensure a better connection.

Use a dry cloth or cotton swab with a bit of rubbing alcohol to clean the charging pins in the charging case and on the earbuds to ensure a better connection. However, it's worth mentioning that the delay can be influenced by various factors such as the Bluetooth headphones themselves, the connected device, the audio source, the specific application being used, and even the network conditions. When the battery of the charging case is lower than 60%, the light in the middle of the charging case will turn white for 5 seconds and then go out. Ensure that the ear tips are not blocking the charging pins on the earbuds and in the charging case.