The 3.5mm stereo Y-splitter cable allows you to easily connect stereo headphones and a microphone to both the PC audio port and the microphone port. Enables you to add mono microphone input as well as stereo output to your PC or laptop via a single 3.5mm audio port. It works with all PC Apps, such as Skype, MSN Messenger, for Yahoo, for Google Voice, etc. Gold-plated connectors: 24K gold-plated for better sound quality and less loss. Copper provides maximum conductivity and durability Innovative Audio Port: While some laptops like for Dell have only one (4-bit) 3.5mm audio port to support audio in and out, this innovative headphone splitter adapter splits the audio port into two different ports, one can be used for a microphone input connection and another for connecting external (output) speakers Notes: To ensure proper hardware detection, we recommend plugging your external headphones into the adapter before connecting the adapter to your computer or mobile device. Compatible with CTIA standard Android earphones only, not CTIA standard Apple Earbuds. Not compatible with Beats headphones, for Bose Earbuds and for Apple headphones.