[Noise canceling & Mute Function]: This bone conduction headphones utilizes advanced environmental noise reduction technology to effectively block out most background noise, achieving a face-to-face style of communication during phone calls. The mute button on the headset microphone can be easily touched, allowing you to mute the call at any time when it is inconvenient to speak. (Active Noise Cancellation for Non-In-Ear Headphones) [Upgraded Air-conduction Headphones]: As an upgraded version of bone conduction bluetooth headphones, the Air Conduction Bluetooth Headset uses air to transmit sound waves to the cochlea, without producing the headache-inducing vibrations of bone conduction. It is more comfortable and doesn't cause any pressure or pain even when worn for a long time.