Optional wallplate for the 8 Input To 8 Output Matrix Mixer (Model: A5400A). The wallplate will not work on its own. The wallplate may be installed in each zone and connected to the matrix via its analogue control inputs. The wallplate allows source selection and volume control adjustments for that zone. The unit can also be controlled via an external system such as Creator Crestron, AMX or by a PC and supplied software.