The MC4-BT is a mic/line audio mixer with localized Bluetooth receiver and manual volume control of Bluetooth signal. Manual pairing button allows for specific Bluetooth connection and disconnection when desired. Fits into a two gang electrical box with RJ45 connection that provides: power, audio, balanced/mixed signal through a CAT5 cable. Includes a 15VDC, UL Listed, efficiency level V (Energy Star) power supply. ideal for classrooms, treatment and surgical rooms, showrooms, conference rooms and retail.