It is compatible with Earbud (4th Generation) ANC version, A3055/A3056/A3057 earbuds, and A3059 charging case. It only contains the Right earbud.
**Warm Tips: It is incompatible with Earbuds (4th Generation) non-ANC version, charging
case: A3058, or earbuds A3050/A3053/A3054. If you charge the charging case in advance, you can use it to charge the earbuds when you go out without a power supply. Please note that these earbuds (model numbers A3055/A3056/A3057) are only compatible with the Earbuds (4th Generation) charging case (model number A3059). It is pretty good, refurbished.
Pairing Instructions: 1. Forget your Earbuds from the device list; 2. Plug the charging case into a power source; 3. Put in the new earbud and wait for 30-60 minutes; 4. Open the lid of the charging case; 5. Press and hold the setup button on the back of the case for about 15 seconds, until the status light on the front of the case flashes amber, then white; 6. Connect the earbuds to your phone. **If it does not work, please check if the models of the left and right earbuds match