Philips Respironics EverFlo Q 5 Liter Home Oxygen Concentrator with OPI

Philips Respironics EverFlo Q 5 Liter Home Oxygen Concentrator The ultra quiet EverFlo Q includes all of the great features of the original EverFlo Oxygen Concentrator in a quieter model. At just 43 decibels typical EverFlo Q is one of the quietest concentrators on the market. Its small form factor, advanced motor, low power usage, and lightweight, durable construction make it easy, convenient, and very popular! OPI (Oxygen Percentage Indicator) ultrasonically measures oxygen output as a purity indication. If the oxygen output falls below normal levels, an orange light will turn on and the unit will sound an alarm.  Please note - Any smoking while using the unit or evidence that the unit has been used in a smoke filled environment will void the warranty. FEATURES POWER SAVING & TROUBLE FREE Ever Flo Q is designed from the ground up to deliver consistent trouble-free performance and reduce overall oxygen therapy costs. Its advanced motor provides 5 LPM of Continuous Flow Oxygen, wh