Plantronics .Audio 400 DSP Duo Noise-Cancelling Computer Corded Headset

Specifications:

• Full Range Stereo, Volume Control, Noise-Cancelling Microphone, Microphone Mute Switch, Foldable Headband, USB Compatible
• Speaker Driver Size (Diameter)- 28mm
• Speaker Sensitivity (dBPa/V)- 27
• Speaker Frequency Response (Hz–kHz)- 20-20
• Speaker Impedance (Ohms)- 32
• Microphone Sensitivity (dBV/Pa ±5dB) - -38
• Microphone Type (Unidirectional) - Electret
• Microphone Impedance (Ohms)- 3k
• Microphone Frequency Response (Hz–kHz)- 100-10
• Cable Length - 3.0 M
• Plug(s) - USB