Wireless Earbuds, Bluetooth 5.2 Headphones Mini Wireless Headphones In Ear with Noise Cancelling Mic, 144H Bluetooth Earbuds with HiFi Stereo Bluetooth Earphones Sport IP7 Waterproof, LED Display

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If the sound just doesn’t work at all, well that’s pretty self-explanatory, those earphones need to get in the bin! Another definite sign your earphones are on their way out is how long the battery is lasting. If they’re dying every few hours or taking forever to charge, you may have to think about upgrading. Press the MFB of both earphones for about 3 seconds and then power on. If only one side of the earphone flashes red and blue, then the reset is successful.

Excessive volume for a long time will stimulate the ears and have a negative effect on hearing. Please avoid overly loud volume as it might damage your hearing. Please raise the volume up slowly.The last thing you want to do is ruin your warranty by making the problem worse – always make sure you know what you’re doing before you attempt any DIY repairs, otherwise get a professional. When will I need to buy new earbuds?

If you have adjusted the sound on your phone or computer and find that the sound from your Bluetooth earbusd is still too high or too low, it is usually because volume synchronization is not enabled on the connected device. In this case, please adjust the sound through your Bluetooth earbuds. Don't place them in areas with WiFi, router or other high-frequency transmission devices as it can affect the reception of the earphones. It is the cause of the intermittent sound. Please make sure that there is no problem with the charging cable or the charging adapter and that the charging cable is inserted correctly. In the case of connecting to other smartphones, the earbuc searches for the connected device by default, and needs to wait about 2 minutes before connecting to the new phone.The charging points for the headphones are dirty, possibly covered with dirt and sweat. Please wipe it off with a cloth. The Bluetooth communication distance is 10m. Please make sure there is no large obstacle between earphones and the phone. Please keep the smartphone and earphones close to use. When charging the earbuds, the headphone's red light will light up. After charging, the light will disappear. The earbuds can be charged by connecting them to a 5V charging head or computer USB port using the included micro-USB cable. TEST REPORT Report No.: BCTC2010001480E Applicant: Shenzhen KingAnDa Technology Development Co., ... Issue Date: Report No.: Test Standards Test Results Remark: Bluetooth headset N/A YYK-520 HBQ-Q81, HBQ-Q82TWS, HBQ-Q38TWS, Q33, YYK-ANC, YYK-Q32, YYK-525, YYK-530, YYK-ANC Pro Shenzhen KingAnDa Techn...