The MT201 is a microphone with an attached USB cord that allows you to connect to the computer for any VoIP sessions, such as Skype, Vidyo, etc. This device requires connection to speakers for the Solo to function. The Solo USB is a powerful microphone with boardroom conference quality in a desktop design. The microphone redefines the standard for business quality Voice Over IP conferencing. It will enhance your output with clear audio and full-duplex technology, while resolving background noise, acoustic echo and proximity effects.