Female Side is mmcx plug：This convert is worked for mmcx cable connected with different 2 pin earbuds. Male Side is angled 2 pin：This adapter earbuds side is compatible for KZ EDX ZST ZSTX ES3 ES4 ED12 ZSR AS10 AS06 ZS10 BA10；For CCA C10 C16 CA2 CRA. Audio Unchanged：The adapter is small and convenient. It does not improve the sound quality, nor does it change the original sound quality of the headset. Many Types：We also have many other types adapters which can help you to resolve the different cables connected to different earbuds.Let you enjoy the DIY HiFi life.Provide more possibility. After-Sales Service: Please rest assured that we will provide a one-year warranty for our products. If you have any questions or doubts, please contact our 24-hour convenient customer service. Precautions for Product Use: 1. Please confirm whether the model is suitable before inserting the adapter. 2. After confirmation, make sure that the adapter has been stably inserted into the earphone/wire. 3. If it is not completely inserted, it may cause the adapter to be loose during use, which will affect the use experience of the product. If you confirm that there are still other problems after the above operation, please feel free to contact customer service and we will solve them for you! Thank you for your understanding and recognition!