Why buy and carry around another headset for your PC? Use your existing 3.5mm smartphone/iPhone headset with your PC computer that has 3.5mm jacks! A big productivity enhancer for home businesses, sales people, road warriors, or anyone who is on the phone all the time, but doesn"t want to carry two headsets, one for the computer, and one for the phone. Also a great way to save hundreds of dollars by using cheap or free calling services from Skype, MSN Messenger, Yahoo Messenger, and Google Voice. Works with your standard smartphone headset with a 3-channel, 4-conductor 3.5mm plugs (1/8inch) and PC 3.5mm mic and audio jacks. Compatible with PC computers. Specs: This amazing adaptor converts the smartphone stereo headset 3.5mm plug to a dual mic/audio 3.5mm plugs, allowing you to use your favorite smartphone headset with your PC or laptop computer. This headset adapter is designed for use with headsets that have a 3.5 mm stereo plug. This adapter outputs stereo sound. Mac users: If you have a Mac 2008 or older, because many mac computers need an amplified microphone source (such as an iMic), you will need both this adapter and our PC Headset to USB adapter.