Invacare PerfectO2 Oxygen Concentrator (Provides supplemental oxygen to patients with respiratory disorders)Model Numbers: IRC5PO2VAW, IRC5PO2AWSerial Numbers Range: 10CSZ43XXXX - 12GSZ62XXXXManufactured between March 2010 to August 2012 Dianz capacitor date codes 2010.03. XD to 2012.08.XD ARTG Number: 144033