"""Plantronics BNS for Voice Tubes, Product # 10757-00 The Plantronics 10757-00 background noise suppressor is for any Plantronics headset with a voice tube. The suppressor directs more of your voice into the tube making the person your talking to hear your voice better and shields background noise from being heard. For true noise-canceling, a noise-canceling headset is required which has a mic boom instead of a voice tube and electronically lowers background noise by up to 75 . The 10757 slides onto the end of an existing voice tube. 10757-00 Features: Background Noise Suppressor, For Headsets w/ Voice Tube, Better Voice Quality, For Use w/ Plantronics Models: H101, H101N, H141, H141N, H171, H171N, H251, H251N, H251N-UNC, H261, H261N, H261N-UNC, H31, H31N, H41, H41N, H81, H81N, H91, H91N, HW251N, HW251NUSB, HW261N"""