br br The Agent 300 has a noise cancelling microphone which cancels out extraneous noise from other sources, and because it only has one earpiece, you can still communicate with colleagues while you're wearing it. It's comfortable enough for prolonged wear, with an adjustable headband to fit all head sizes, a flexible boom to suit your preference and a leatherette ear cushion, so it sits snugly over your ear. br br . Single ear headset br . Noise cancelling microphone br . Adjustable microphone boom br . Adjustable headband br . flexible boom br . Leatherette ear cushion(s) br . Quick disconnect br . CE approved br .