Sennheiser SC 230 CTRL II USB Mono Headset

EPOS Sennheiser SC 230 CTRL II USB Mono Headset - UC Optimised - Frequency Response (Microphone): 150 - 6800 Hz - Frequency Response (Headphones): 50 - 18000 Hz - Noise-Cancelling Mic with Voice Clarity Technology - In-line call control unit - Connector: USB - 506480 - 2 Years Limited Warranty