Invacare® IRC450 Check O2 PlusConcentrator AnalyzerDesigned with technicians in mind. Measure oxygen purity, flow rate and outlet pressure all in one, simple, two-button device without the need for in-field calibration. Features: Automatic shut-off extends battery lifeTwo AA batteries provide over 16,000 readingsIncludes connection tubeProtective boot helps increase product integritySpecifications: Oxygen: Oxygen Measurement Range: 21%-95.6%Flow Settings: Flow Measurement Range: 0-10 LPMPressure: Pressure Measurement Range: 0.5-50 PSIProduct Weight: 6.4 oz. Product Specifications BRANDInvacare® MANUFACTURERS PART NUMBERIRC450 WEIGHT LBS0.4 COLOR FINISHBlue DESCRIPTIONCheck O2 Plus Oxygen Analyzer DISPLAYDigital POWER SOURCETwo AA Batteries TYPEOxygen Analyzers PACKAGE QUANTITY1 LIMITED WARRANTY3 Years OXYGEN CONCENTRATION21%-95.6% ±1.5% OXYGEN OUTLET PRESSURE.5-50 PSI ±.5%