This module just displays the digital signals sent to it (serial data) and there is NO live audio going to this board

Ex broadcast equipment, this display board is from the Logitek Remora 4 audio control surface
Logitek Remora 4 Control Surface (Operator Panel) SPARE PART
VU/Level Meter – two channel DISPLAY board
Part # LG 372

27 chip LED’s on each channel displaying audio signal levels from +16dB to -35dB2x Maxim MAX7219 Serial in LED display driver IC’s – these are under control of another module.Comes with the design face plate and mounting hardware.The face plate is currently scaled as centre zero and swings either side from -35 to +16 with each side of the scale marked L or RSmall modules, the dimensions of the display panel are:84mm high x 21mm wide
Fully functioning prior to removal from service and sealed/stored in an ESD bag.