ITEM NAME:VH500D For PC Phone Call Center 3.5mm Wired Line Control Microphone Headset Product Description Description: VH500D 3.5mm Wired Line Control Headset for PC Phone Business Call Center Microphone Headphone Specification: Model: VH500D Plug Diameter: 3.5mm Headset: Wired Headset Microphone: Single Directivity High-Definition Anti-Noise Microphone Sounding Principle: Moving Coil Frequency Response Range: 100-6600Hz Microphone Impedance: 2.2KÃŽ © Microphone Sensitivity: -40Â ±3dB Speaker Impedance: 150ÃŽ © Speaker Sensitivity: 116Â ±3dB Distortion Rate: 5% Wire Length: 2m/6.56ft Speaker Diameter: 27mm/1.06" Gross Weight: 200g Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 XÂ Call Center Headphone.Model: VH500D. Headset: Wired Headset. Microphone: Single Directivity High-Definition Anti-Noise Microphone. Microphone Impedance: 2.2KÃŽ ©. Included: 1 X Call Center Headphone. Microphone Sensitivity: -40Â ±3dB.