Self-contained breathing apparatus (SCBA) is a type of personal protective equipment that provides breathable air to the wearer in environments where the air is contaminated or oxygen levels are depleted. Other components that may be included in an SCBA set are a harness for securing the apparatus to the user, a voice communication system, and additional features like integrated thermal imaging cameras heads-up displays. SCBA is commonly used by firefighters, first responders, and industrial workers in hazardous environments such as fire incidents, chemical spills, confined spaces, or areas with low oxygen levels. It provides a portable and independent air source, allowing the user to breathe safely and work effectively in these challenging conditions. It's important to note that proper training and regular inspection and maintenance are essential for the effective and safe use of SCBA sets.