When you choose the Yealink UH34 Duo Lite headset, you select a device with a variety of features that enhance your audio experience to the level of a face-to-face interaction. The powerful unidirectional microphone with passive noise cancellation transmits your words clearly and naturally while reducing background noise, ensuring that only your voice is understandable to others. Full-range speakers ensure that you can hear your conversation partners clearly and distinctly, making it feel as if they are right there with you. With user hearing protection as a top priority, Yealink has incorporated ActiveProtection technology, a feature that limits the decibel level to protect users' hearing from noise peaks that can occur during a call.