A breathing apparatus and system include a breathing apparatus having a display, an internal memory unit, and a processing unit, and optionally an interface for connecting at least an external memory unit to the apparatus； optionally an external memory unit connectable to the breathing apparatus via the interface； wherein the processing unit is in operative communication with the display, the internal memory unit, and/or the external memory unit when connected to the apparatus via the interface, and the processing unit is configured to provide on at least a portion of the display, a user selectable background stored on at least one of the internal and/or external memory unit, such as a background image, or a background color different than a factory default background color that is not selectable by a user.
