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 MACH10-80 Connector?This adapter headsets side is compatible for Etymotic EVO UE PREMIER,for Westone Pro X10 X20 X30 X40 X50,for MACH80/70/60/50/40/30/20/10 Headphones. Female Side is 2pin connector?This convert is worked for 2pin cable connected with MACH10-80 series earbuds.