Dahua Wired/Bluetooth Omnidirectional Speakerphone DH-VCS-MCA450 is dedicated designed for clear, efficient video and audio conferences. It features a four-mike array with ultra-high sensitivity, a pickup radius of 3-5 meters, and a 360 degree omnidirectional no-dead angle that is ideal for personal offices, small and medium-sized conference rooms, and other office environments. Moreover, it's crystal-clear sound, portbal design and wireless connection allow people to use it with any mobile phone or PC based communication software (like skype, zoom, whatsapp) to enhance audio quality and comfort on-the-go, in home or office