The HCS-4851 is a flush-mount unit with a retractable line array microphone and mic. activation button. A cover plate hides all electronics when the microphone is fully retracted. When taken out for usage, the TAIDEN HCS-4851 microphone array has a total length of 20cm (7.9 inches) with a 30-degree lean angle; the microphone placement offers proximity to the sound source while using the advanced physical characteristics of a microphone array ensuring excellent pick-up of the human voice and rejecting ambient noise from above and below the microphone.