MyMonitorII allows you to control your monitor mix and volume for your best performance every night. The MYMonitorII allows blending of any microphone source with any stereo source in a convenient personal monitoring solution. The microphone thru provides direct connection to any mixer and will pass phantom power from the board for powering condenser microphones. Built for maximum flexibility, the ARTcessories MyMonitorII can be powered with the supplied 12vDC power supply, or from an internal 9v battery.