Speaker & Headphone/Headset Audio Switch - With Volume ControlOverview - Easily switch between your speakers and headphones/headset with one of the buttons, removing the need to keep changing plugs at the rear of your computer. The other button can be used to switch the microphone functionality on/off. The volume control changes the sound level on the headphone and speaker port (the speaker connection cannot be seen in the picture). Perfect if your computer is in a hard to reach place and helps save on wear and tear on the sound card connections too. Commonly used when listening to music through speakers on a PC, if a call comes through on a VOIP program such as skype, you can quickly swap the sound to your headphones. OutputsSpeaker Jack Socket: 3.5mm Stereo (cannot be seen on picture)Headphone Jack Socket: 3.5mm StereoHandsfree jack: 2.5mm Stereo (this can be used with a 2.5mm headset - mono earphone and mic)Microphone Jack Plug (pink cable): 3.5mm StereoInputsSpeaker/Headphone Jack Plug (green cable) - 3.5mm StereoMicrophone Jack Socket: 3.5mm Stereo