If you dont hear from one earbud:
1. Please check whether the earphones are charging properly.Inspection Method: Open the lid of the battery box, put the earphone into the battery box, close the lid.Check whether the LED lights on both sides are flashing.
2. If you cannot charge properly, use cotton swabs with disinfection alcohol to clean the charging terminals of the earphone or battery box.
About Battery Box LED Display:
The LED on the battery box will only light up while you open the lid, close the lid, or charge the earphone.When the earbuds are fully charged, the LED will turn off.
Pairing Problems:
1. Pairing method: Open the Bluetooth in your phone settings, open the Bluetooth earphone battery box, take out the earphone, and finally select K 3 in the Bluetooth setting, and pair it.
2. Note: Bluetooth headset can only be paired with one device.If you want to replace your paired device, you must cancel pairing with your original device.
Low noise or bad noise cancellation:
Please check if the earbuds are properly attached.One earphone has two pronunciation holes, if the earphone is not completely inserted, the sound from the side pronunciation hole is blocked, greatly reducing the size of the sound and noise canceling effect.