Description The Bonsai Velocity is the most efficient pneumatic conserver on the market, enjoying more liter flow equivalencies, continuous flow settings, and a higher savings ratio than the competition. As measured between 20 to 35 BPM (Breaths Per Minute), the Bonsai Velocity has an oxygen concentration of 0.8% to 2.0% higher than that of the EasyPulse5, on average. The Bonsai Velocity's decreased delivery time increases oxygen concentration provided to the patient, thus increases the ability to better maintain patient saturation levels, all while maintaining up to a 6:1 conservation ratio. Features Highest savings ratio on any pneumatic conserver Delivers up to a 6:1 savings ratio Liter flow increments: 1, 2, 3, 4, 5, 6, plus two CF settings, factory preset at 2 and 4 LPM Operating pressure range: 200-3000 PSI Senses a breath/delivers oxygen in the first half of the inspiratory cycle Delivers a uniform oxygen pulse from 14-40 breaths per minute Easy to operate single selector knob Lightweight, quiet operations, compact design Fits easily in virtually any carry bag Warranty: 2 year limited Specifications Liter Flow Increments: 1, 2, 3, 4, 5, 6 plus two CF (Continuous Flow) settings preset at 2 LPM and 4 LPM (Liters Per Minute) Operating Pressure Range: 200-3000 PSI Model #OM-812