Fone Auricular c/microfone A4TECH HS-12 Superior Sound Quality-Transparent Bass Driven Sound .Light Weight & Single Clip-on Portable Style,All day Comfort and Reliability .360 degrees Rotation Design-Convenient for Left and Right Wearing .Noise Canceling Microphone Delivers Clean,Crisp Sound .Convenient Volume and Microphone Switch .Works Great with Telephony Services Such as MSN,AOL,Yahoo,Skype,and Net2phone etc...