Dear buyer:Each product will undergo various functional tests before packaging to ensure that it is in optimal condition. If used improperly, electronic products can easily be mistaken for faulty products. If you have any questions, please do not easily file a claim. You can leave detailed information in the order or contact us, and our after-sales service will be provided within 24 hours.Q: Why is there no sound in the headphones? Or does Bluetooth fall off intermittently? Only one earphone is playing music.If other mobile phones or devices are already connected to Bluetooth headphones, please cancel pairing first2. Delete the previous Bluetooth pairing record on the phone, and simultaneously remove two headphones from the charging share. The light flashes, wait for 10 seconds, and the two headphones automatically pair successfully. Turn on the phones Bluetooth, search, and pair Bluetooth again.2. Please restart your phone Bluetooth or reset the headphones or restart your phone and pair Bluetooth again3. Please adjust the phone volume or adjust the earphone volumeThe Bluetooth distance is 10 meters, please ensure there are no obstacles, and the phone needs to be close to the headphonesQ: Unable to load Bluetooth headphones?After a period of use, the contacts will rust, sweat, and dust, making it difficult to charge or open the headphones. Firstly, clean two-thirds of the earphone contacts and charging box with alcohol and a cloth to solve the problem.2 may have poor contact. Press the headphones with your fingers and fully connect the charging box of the headphones to the charging box.*********************************************How to solve the pairing problem and Bluetooth connection failure of Bluetooth earphones?Most of the time, when customers use a pair of Bluetooth headphones, they do not pay each other, but one of the headphones is connected to the phone. To address this issue, customers need to follow these steps:1. Delete previous Bluetooth connection records on the phone;2. Remove the left and right ears from the charging room or restart the headphones, wait for 10 seconds, and automatically pair the left and right ears;3. Turn on your phones Bluetooth and connect it to your phones Bluetooth.Sellers guarantee: 1 month