Creative HS-450 Wired Stereo Headset - Over-the-head - Ear-cup - 32 Oh Headphones Driver: 40mm Neodymium magnet Frequency Response: 20Hz - 20kHz Impedance: 32ohms Sensitivity (1kHz): 105dB/mW Microphone Microphone: Noise Cancelling Condenser Frequency Response: 100Hz ~ 16kHz Impedance: &lt; 2.2 kohms Sensitivity (1kHz): -42 dBV/Pa Cord length: 2.5m Input/Output Plugs: 3.5mm gold-plated stereo plug x 2 Net Weight: 145g (without packaging)