The Ashly WR-1 is a wall-mount remote volume control unit for the 24.24M. It has two volume control knobs that are "attenuate only", which means that the maximum setting of the control knobs results in a 0dB gain. Each knob has a window for user-generated labels.
The WR-1 mounts in a standard electrical box and can be covered with a standard plate. It connects to the 24.24M via a Euroblock connector and can be wired to control the volume of any combination of inputs or outputs on the 24.24M.