USB to Audio With the IB-AC527 You can easily extend your PC with a headphone and a microphone jack. It is especially useful for headsets with 2 separate connectors. The unique sound chipset in the adapter provides higher audio quality for listening to music and online phone calls. Gaming or online calls? The IB-AC527 supplies 1x 3.5 mm output for headphones/speakers and 1x 3.5 mm input for microphone and supports all headsets with corresponding connectors. Simply compatible The USB 2.0 port is widely used on PCs and notebooks, USB 3.0 and 1.1 are supported as well. This makes the small adapter both mobile and versatile.