The PRO Digital Overlay is an ultra-thin faceplate for electronic labeling of a Hear Back PRO Mixer. This attachable upgrade modifies and expands the display of channels and mixer functions through high contrast OLED graphical displays. The Digital Overlay permanently mounts directly onto the PRO Mixer’s face and connects via a ribbon cable into the Mixer’s side expansion slot. The naming functions can be accessed and updated through the iOS app or via a computer, for added flexibility. The PRO Digital Overlay is a time saving and easy to read solution to the standard scribble strip for engineers and end users in studio sessions and live entertainment settings.