3.5mm stereo y-splitter adapter allows you to easily connect your stereo headset & Mic to a PC audio port and mic port at the same time. It works with all PC Applications - Skype, MSN Messenger, Yahoo, Google Voice etc..It can turn the combo port into two distinct ports - one 3.5mm headphone jack and one 3.5mm microphone port. 3.5mm stereo splitter cable allows you to easily connect your stereo headset Mic to a Tablet / Mobile audio port and mic port at the same time.Mic port is not for record voice, it just for voice outgoing. Compatible with all mobile phones /Android Handsets / Tablets / Laptops and any mobile devices with a combo headphone/mic jack (3.5mm Jack)Unique U shape design, Specifically for headsets with mic capability, Overcomes the limitation of some laptop audio ports. . It cannot be used to split the audio output to two separate sets of headphones or speakers.