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Noise Cancelling Communication - The call centre headset comes with noise cancelling function to keep background noise outside and clean noise to create clear communication. Mute function - A mute button in the inline button allows you to power on/off the microphone to make it more convenient to use. Hearing Protection - There is an inline scroll helps you adjust volume freely to protect your hearing. SUPER LONG CABLE - Super long cable up to 250cm/250cm allows you to record files a little far away from which you record while answering a call to solve problems quickly for customers immediately and more. Universal Compatibility - The call center USB headset can be connected to computer, phone, desktop box and other devices to achieve clear, stable and smooth communication with no wedging or conflict.