Type-c to mm converter-- durable wear resistant and. Type- adapter-- this converter is a great solution for you to connect the 3.5 mm headphone to your type-c devices which have no headphone jack. reduce electromagnetic caused by headsets. Type- converter for phone-- this type c adapter is positive and negative random interpolation. no matter how you are inserted they are correct. do not worry about the traditional USB port brought positive and negative issues. Type-c headphone adapter-- made of quality material it is able to maintain the original sound quality of your headphonesType-c to mm headphone adapter-- it supports mobile phone with type-c port.