ELEGIANT RJ11 Call Center Noise Cancelling Corded Monaural Headset Headphone with Microphone for Desk Office Telephone Noise-cancelling microphone filters out background noise, so voice transmission is exceptionally clear. Sensitivity: 108dB+-2dB/mw at 1KHz Bendable mic arm 330 degrees rotatable to be positioned for optimal comfort and voice transmission. Swing-sway feature lets you move the mic out of the way for beverage breaks. Adjustable metal headband can be adjusted, with replaceable soft foam or soft leatherette ear pad optional. Speaker and headband connection rotate 360 degree, with Quick-disconnect function. Stylish design, lightweight, durable and comfortable for all day use.