The lightweight and compact Evolution oxygen conserver delivers a uniform oxygen pulse in seven increments preset at 2 lpm.

• Sensor detects light and heavy exhalation
• Delivers a 5:1 savings ratio from 14-40 breaths per minute
• Minimum 2-year battery life (average 4 hours per day usage) utilizing 2 AA batteries
• Single-push button selects the equivalent lpm dosage settings