The EVOLUTION OM-900 oxygen conserver meters the oxygen delivered to the patient for maximum tank duration. Sensing the patient's inhalations, a measured, uniform dose of oxygen is delivered via nasal cannula. The EVOLUTION offers an average 5:1 increase in usage time over a continuous flow regulator system.

• 1-7 liter per minute flow equivalency settings
• Continuous flow switch allows continuous flow at two liters/minute
• Easy access to battery compartment, size 2 AA batteries included
• Couples to standard post valve used on size M-6, C, D, and E cylinders
• Automatic shut-off
• 2-year limited factory warranty
• Additional shipping fees apply