The GN 2120 Flex Noise-canceling, single-ear headset features a click-stop headband that provides a customized fit. The pillow-soft ear cushion rests gently over the ear and a generous headpad comfortably secures the other end. The advanced noise-canceling electret microphone filters out surrounding sound, so only the speaker's voice is transmitted. That helps you maintain a professional image in your calls and makes it easier to be clearly understood. Use with GN Netcom corded or cordless amplifiers.