Highly reliable, low-maintenance, trouble-free option. Ensures consistent, high oxygen concentrations. Flow adjustable in (1/2) liter increments to 5 lpm. Pressure-based system automatically adjusts valve cycle time. Extensive alarm and safety system protects patients. Top handle, quick access door for both filters, low flow alarm and diagnostics memory. Homefill™ II compatibility. Available with or without oxygen sensor (SensO2™) 5-year warranty.