Philips Respironics Anti-Static Chamber is an expansion chamber, with low resistance valves (for the patient to breathe freely), expiratory valve (measurement of respiration count), anti-static chamber (increases inhalation time), ladder mouthpiece (for smaller mouths), adapter that securely holds the MDI in place, high-flow whistle (for better breathing technique).
Follow the instruction manual of Philips Respironics Anti-Static Chamber.