Carbon Dioxide (CO2) Fire Extinguisher, which is primarily designed for use on Class B (flammable liquids like petrol, paint, and oils) and electrical (Class E) fires. It works by discharging compressed carbon dioxide gas that smothers the fire by displacing oxygen and also provides a cooling effect. : CO2 is non-conductive and leaves no residue, making it ideal for protecting sensitive electrical equipment in places like offices, server rooms, and laboratories.