This adaptor is used for communication over your PC network via your actual Pilots headset. Simply plug the two jacks into the audio -in sockets on the back of your PC and plug your headset jacks into the two sockets on the adaptor. Standard configuration is for a Fixed Wing, i.e.: two jacks, but by using a simple fixed wing to helicopter adapter this can also be used for use with a helicopter headset. Ideal for flight simulation training especially when linked via Broadband to one of the many On-line virtual ATC services available for free on the Internet. Of course in many flying schools, there is high end simulators available for PPL, CPL and ATPL training and ability to use your own headset in these situations creates a more realistic session.