The AtlasIED TSD-MIX42RT 4x2 mic/line mixer is ideal for applications where paging, priority music override and/or remote input selection with level control are required. Use alone or in conjunction with amplifiers in meeting rooms, digital signage, luxury suites, and other applications requiring versatile, stereo or mono multi source mix control. Unit requires Power Supply that is sold separately for proper function, multiple TSDs can be powered with one power supply based on current requirements. Click here to use the TSD Power Calculator to find the correct power supply for your application.