Our after-sales?:If you have any issue or idea about our products,please feel free to contact us.We will provide the best solution for you.We not only provide high quality product,but also with high after-sales service. 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. 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. Male Side is for Pentaconn Ear PE Connector?This adapter headsets side is compatible for Pentaconn Ear PE Headset Work for ACOUSTUNE HS1650CU HS1655CU 1670SS HS1695Ti 1697Ti ARS153 HS2000MX Headphones. Female Side is mmcx connector?This convert is worked for mmcx cable connected with MACH10-80 series earbuds.