Delivers A Uniform Oxygen Pulse At Increments: 1 2 3 4 5 And 6 * Two Continuous Flow (cf) Settings Preset @ 2 Lpm And 4 Lpm * Delivers Up To A 6:1 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 * Light Weight And Quiet Operation * Easy To Operate Single Selector Knob * Compact Design Fits Easily In Virtually Any Oxygen Carry Bag *