C6 How to connect？ Stereo mode 1. Open the charging case, the two earbuds will automatically turn on and connect to each other, waiting to connect to your phone. (no need to remove the earbuds from the charging case) 2. Turn on your phone's Bluetooth and search for "A9", then choose "A9". The earbuds will connect to your phone. Single Earbud Mode 1. Take an earbud(left/right) out of the charging case 2. Turn on your phone's Bluetooth and select "A9". The earbud will connect to your phone. How to solve the problem of volume and charging? Clean the charging contacts, and mesh of ear tips with an alcohol pad to remove dust or earwax that might be affecting charging or sound volume. How to solve the problem with connection? Or the only one-side earbud has sound? Or two earphones can't pair with each other? Or can’t connect to your device? 1. In the state of power on, quickly tap the “Left or Right earbud” 5 times. 2. Delete the pairing record "A9" of the earbuds on the phone. 3. Put the earbuds back into the charging case. 4. After 10s, take the earbuds out of the charging case, search "A9" and pair the phone. How to handle the situations when the earbuds drop into the water? If the earbuds get wet, shake the water out of the earbuds, gently tap-dry each with a towel, and allow them to air dry completely, before placing them in the charging case! Quadruple Use Time - 4 hours of talk time and 6 hours of music time in earbuds. An additional 4 times battery life is provided for earbuds through the 320mAh charging case. Therefore, up to 48 hours of use time in a single headset rotating. Digital Power Display - Convenient to grasp the real-time power of the charging case and headphones' charging power level at any time to ensure timely charging for the charging case. Superior Audio - With 13mm dynamic speakers to create a wide sound field and balanced listening experience, Each sound details to the heart, so that you really feel the live-grade sound, in addition to the built-in microphone for clear calls. Brand-New Bluetooth Tech - Equipped with the latest technology of Bluetooth version 5.3, which significantly enhances Bluetooth performance and provides a 10m/33ft connection range with faster speed, more stable connection, and wide compatibility than before. Wearing Free - Single earbud lightweight is about 3.6g and matches with 3 different size earcups for DIY. Perfectly fits the ear curve of the semi-in-ear ergonomic design to let the ear free stretch and enjoy a more comfortable wearing experience. Package Contents - Earphones * 2, Eartips * 6, USB C Cable * 1, User Manual * 1, and friendly customer service. ( *Please remove the protective films of the earbud's charging point before using it and read the “User Manual”