Evolution Electronic Oxygen Conserver

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