Sennheiser SC 665 USB Stereo USB Headset

EPOS Sennheiser SC 665 USB Headset - Skype For Business (SFB) & UC Optimised - Impedance: 40 Ohms - Frequency Response (Microphone): 50 - 6800 Hz - Frequency Response (Headphones): 50 - 18000 Hz - Ultra Noise-Cancelling Mic with Voice Clarity Technology - In-line call control unit - Connector: USB + 3.5mm - 507257 - 2 Years Limited Warranty