C2G 27394 4-Pin 3.5mm Microphone and Headphone Breakout Adapter Y-Cable (6 Inch) Connect a separate set of headphones and a microphone to a single 4-pin 3.5mm port The 3.5mm port on the device must be a 4-pin 3.5mm port capable of supporting a mono audio input and a stereo audio output. 3.5mm Stereo Male 3.5mm Stereo Female