The YVC-330 USB is a conference phone with Bluetooth, USB, and audio jack connection. Two of these devices can be daisy-chained to cover a larger area plus it has “ Plug-and-play” connectivity with driver-less USB, Bluetooth, NFC, and audio in/out connection interfaces that allow options for true flexibility. High compatibility with all UC applications. Three high-performance unidirectional microphones automatically track voice directions, enabling human voices to be focused on and picked up clearly. Additionally, the SoundCap feature offers capabilities like reducing the impact of the noise, self-silent (or automatically mute) the mic, and balance the sound of your voice, all this to make sure that users are heard clearly.