Female Side is mmcx plug：The mini 2 pin is very small,please be careful to operate while you connect these adapters.This convert is worked for mmcx cable connected with different 2 pin earbuds. Male Side is mini straight 2 pin：This adapter earbuds side is compatible for KZ ZS3 ZS3E ZS4 ZS5 ZS6 ZSA ED16,for TFZ King Pro, QUEEN;for YINYOO QT2, QT5；for SIMGOT EN700PRO, AZLA ,KINERA SEED, EARBUDS；for TRN V10 V20 V80 V90; CCA C10 C16 A10 etc. 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!