The XAAB002A Audio Accessory Box allows GAI-TRONICS desksets to connect to hands-free accessories such as headsets, desk microphones, gooseneck microphones, and footswitches. Industry-standard plug-in connections for each accessory result in effortless changing of microphones. The Audio Accessory Box is a true "plug-and-play" device, offering greater flexibility than any other product on the market