The Dual “Y” Adapter Cables for Mono headphones are designed to allow two people to use the same mono headset. This can be useful in a number of situations, such as when two people are flying together and want to communicate with each other, or when a student and instructor want to use the same headset during a lesson. The cables feature a “Y” shaped design, with one end connecting to the headset and the other two ends connecting to separate audio devices. This allows each person to hear their own audio feed while still being able to communicate with the other person through the headset microphone.