Input: 3.5MM for headphones or earphones
Output 1: 3.5MM for headphone jack on computer/laptop
Output 2: 3MM for microphone jack on computer/laptop
Connect
stereo headphones and microphone to both your computer's audio port and
microphone port. Compatible with laptops, cell phones, desktop
computers and other devices via a 3.5MM audio jack
Clear sound quality, shielded design, shielding anti-interference, presenting a better sound quality effect, the
Better sound quality with less loss
One can be used for microphone input connection and the other for connecting external (output) speakers.