Universal Compatibility - This Telephone Headset with microphone can be plugged into computer, telephone, desktop box and other devices to achieve clear and smooth communication with no stuck. Super Long Cable - Super long cable allows you to take files that a little far away from you while answering a call to solve problems for customer more quickly. Comfortable Wearing - 360° rotary earmuffd and stretchable headband give a comfortable wearing without no fatigue or pain after long time wearing. Lossless Sound - Nylon wires and copper wires ensure the completeness of sound without loss to avoid missing messages. Noise Cancelling - The call center headset comes with noise cancelling function to keep background noise outside to create a clear communication.