It is a good partner for PC VOIP, MSN, YAHOO, AOL, SKYPE etc, internet communications. It is also fit for CD/MD/DVD and other audio electronics with stereo 3.5mm output jack. Spec: Driver unit: 30mm Mylar Speaker Frequency response: 20-20K Hz Impedance: 32ohm Sensitivity: 103dB S.P.L. at 1 KHz Max.Input power: 100mW Microphone: Condenser type Polar Pattern: Omni-directional Sensitivity: OdB=1V/Pa at 1 KHz-68dB Cord length: 2.3M. Any OEM is welcome