The Evolution delivers a uniform oxygen pulse which can range from 14 breaths per minute to 40, supporting a wide range of needs and activity levels. The Evolution Electronic Oxygen Conserver senses a breath and delivers oxygen only in the first half of the inspiratory cycle, resulting in no wasted oxygen while delivering an effective oxygen dose. In addition, the Evolution has a 5:1 savings ratio and liter flow settings between 1 and 7 LPM, providing a high level of conservation while offering versatile liter flow options. An auto shut-off feature conserves the battery life. It fits into most carry bags and has a minimum 2 year battery life with 2 AA batteries (with an average of 4 hours of usage per day).

• Delivers a uniform oxygen pulse at increments: 1, 2, 3, 4, 5, 6, 7 Plus CF preset @ 2 LPM
• Minimum 2-year battery life* utilizing 2 AA batteries
• Delivers a 5:1 savings ratio from 14-40 breaths per minute
• Senses a breath/delivers oxygen in the first half of the inspiratory cycle
• Operating pressure range: 200-3000 PSI
• Weighs only 14.9 ounces with batteries
• Single push button selects the equivalent LPM dosage settings
• Auto shut-off feature conserves battery life
• Fits easily in virtually any carry bag