This USB Headset Noise-Cancelling Mic CS100-USB is designed by Koss and it can be used with an external power source if sound card does not have built-in bias supply. It has a 30-16,000 Hz frequency response and is designed with oxygen-free copper voice coils.
The Noise cancelling microphone provides clear communication and the comfortable foam ear cushions make them comfortable for extended and repeated use. It's cord is a straight, single-entry that is 8 foot long.
Ideal for Classrooms, Libraries and School Computer Labs Covered by the Koss Limited Lifetime Warranty.