Good oxygen machine as needed.

I tested this portable oxygen concentrator at a ski resort at 5000 meters. The high altitude mode kept the 93 percent purity stable. The 7 liter flow did not weaken. The lithium battery performed normally in cold weather. Very impressed with the engineering.

I do not like people staring at my medical equipment. This mini portable O2 generator fits inside a small tote bag. The 30 decibel noise is silent from inside the bag. The pulse dose model has no continuous flow sound. Very discreet and effective.

Renting a portable oxygen concentrator costs over one hundred dollars per month. Buying this unit paid for itself in four months. The 93 percent purity and 7 liter flow match rental units. The 1 year warranty is better than rental agreements.

My breathing pattern is very uneven due to advanced COPD. This portable oxygen concentrator senses every inhalation accurately. The 93 percent purity arrives exactly when I need it. The 7 liter maximum flow handles my exacerbation days. Life saving device.

I spent three hours in a crowded airport with this portable O2 generator. The 30 decibel noise was unnoticeable. The LED screen caught no unwanted attention. The 3.2 pound weight did not hurt my shoulders. The lithium battery still had power left.

I bought the external battery charger and one extra battery. This portable oxygen concentrator gave me 8 hours of runtime. The 7 liter flow at 93 percent purity worked even at 4000 feet elevation. The ultra low noise did not disturb wildlife.

The oxygen filters and water locking cottons are simple to replace. This portable oxygen concentrator comes with two extra filters. The water tank is easy to empty. The instruction manual is clear. The 93 percent purity has not dropped in three months.

The included carrying backpack distributes the 3.2 pound weight evenly. I hiked two miles with this portable oxygen concentrator on my back. The 6700 mAh battery lasted the entire hike at 3 liters per minute. The 93 percent purity prevented breathlessness.

I accidentally dropped this portable oxygen concentrator from my car. It still works perfectly. The 93 percent oxygen concentration remained stable. The lithium battery did not disconnect. The outer casing only has a small scratch. Very well built machine.

My son carries this mini portable O2 generator in his school backpack. At 3.2 pounds it does not add much weight. The 30 decibel noise does not disturb his classmates. The pulse dose model delivers 93 percent purity only when he needs it.

Switching between power sources is automatic on this portable oxygen concentrator. At home I use AC power. In the car the DC charger keeps the lithium battery full. The 7 liter flow never drops below 93 percent purity. Perfect for my active lifestyle.

The unit arrived in three days. This portable oxygen concentrator came with clear instructions. The 7 day money back guarantee and 30 day free return made me confident. The 93 percent purity tested exactly as advertised. Very happy with this purchase.

Even at 5 liters per minute this portable oxygen concentrator ran for 2.5 hours on one charge. The 6700 mAh lithium battery is very efficient. The pulse dose technology helps conserve oxygen. The 3.2 pound weight makes it my daily carry unit.

After lung surgery I needed portable oxygen for three months. This portable oxygen concentrator delivered consistent 93 percent purity at 4 liters per minute. The LED screen showed battery status clearly. The 1 year warranty covered my entire recovery period.

The carrying backpack is comfortable for walking on sand. This portable oxygen concentrator weighs only 3.2 pounds so it does not slow me down. The 93 percent purity and 7 liter flow keep my energy up. The lithium battery lasted 4 hours at the beach.

My husband sleeps through the night now because this portable oxygen concentrator runs at only 30 decibels. The pulse dose model only delivers oxygen when I inhale. The 7 liter maximum flow is more than enough for my pulmonary fibrosis.

Living in an RV means every inch matters. This mini portable oxygen concentrator measures only 6.7 by 3.1 by 7.8 inches. The 6700 mAh lithium battery lets me hike without hookups. The 93 percent purity works great at high altitude campgrounds.

I keep this portable oxygen concentrator as an emergency backup. It delivers 7 liters per minute at 93 percent purity just like my home unit. The lightweight 3.2 pound design means I can grab it during power outages. The car charger is a lifesaver.

I often nap with my portable oxygen concentrator running beside my bed. The 30 decibel noise level is lower than my ceiling fan. The 93 percent oxygen purity stays consistent at 7 liters per minute. The lithium battery lasts through long naps.

The large buttons on this portable oxygen concentrator are easy to press even with arthritic fingers. The backlight LED screen is simple to read. The pulse dose model requires no complicated settings. My 82 year old mother operates it independently.

The small lightweight oxygen concentrator meets 95 percent of my needs. The 93 percent purity and 7 liter flow are reliable. The 6700 mAh lithium battery works well. The 30 decibel noise is very quiet. The 3.2 pound weight is easy to carry. Highly recommended for most patients.

This flight travel friendly portable oxygen concentrator meets all FAA requirements. I took it on a cruise and used the AC power in my cabin. The 6700 mAh lithium battery worked for shore excursions. The 3.2 pound weight did not tire my shoulders.

The 93 percent plus or minus 3 percent purity is exactly as advertised. This portable oxygen concentrator works perfectly at 7 liters per minute. I wish the warranty was longer than 1 year for such an important medical device. The build quality seems good though.

Compared to other brands this unit offers the same 93 percent purity at half the price. The pulse dose technology works smoothly. The LED screen is very readable. The 1 year warranty gives me peace of mind. Very satisfied with my purchase.

The 6.7 by 3.1 by 7.8 inch size fits everywhere. This portable oxygen concentrator is very space efficient. The buttons need a firmer press than I expected. My elderly mother struggles a little. The 93 percent purity and lithium battery performance are excellent. Still recommended.

I can finally work in my garden again. This small lightweight oxygen concentrator hangs on my shoulder with the backpack. The 7 liter flow provides enough oxygen for heavy breathing during physical activity. The lithium battery lasts my entire morning.

The 93 percent oxygen concentration has been stable for four months. This portable oxygen concentrator runs every day without issues. The water tank needs emptying every few hours at 7 liters per minute. The 3.2 pound weight and 30 decibel noise are perfect. Minor inconvenience.