Estone 360&deg; Rotate Dynamic USB 2.0 Mic Microphone For Desktop Laptop PC Computer Silver Professional dynamic USB Microphone for PC or Mac Hi-fidelity dynamic microphone, excellent reproduction of voice Noise-cancelling microphone filters out unwanted background noise Two-button functionality: silver button for the mic OFF/ON, black key to the record button E-mail: press length the button by 5 seconds the LED flashes to start recording, sound recording and then finished by 5 seconds after a long jump out of outlook, you can send a message