[Nondestructive sound quality]USB sound card does not need to pass through wire transfer, only through the y splitter,reducing the loss of sound quality, providing convenient conversion for customers while ensuring the quality of sound.Note: Mic of this y splitter do not compatible with Earbuds or headphones or phone of apples ,USB External Sound Cards Automatic Matching 3.5MM Plug of CTIA and OMTP. [Favorable price]The combined sales scheme not only saves customers' transportation costs, but also reduces our cost.So we can offer a more favorable price. [Compatible with each other]Made by the same manufacturer, after several tests, ensure that the product can work together. [Arbitrary conversion]serve different needs,If the sound card on the computer is damaged or inconvenient to use, you can use the USB sound card as a replacement.If the headphone interface is single, it can connect directly to the USB sound card.If it is a double plug, the interface of the sound card can be changed to two by means of the Y splitter. [Two-in-one]The two conversion tools that can be used together are sold together. It saves your cost of buying different products separately.