Oxygen Concentrator 1-7L/min Adjustable , 24h Continuous Flow ,90% Purity ,Low Noise ≤45dB

Oxygen Concentrator 1-7L/min Adjustable , 24h Continuous Flow ,90% Purity ,Low Noise ≤45dB

I like ir, but it started making a funny little noise and it isn’t the air flow. Is it normal for it to get hot underneath? It works just not sure it I should run it. an you help me?

I'm feeling much better , better exercise, sleep, no pain in muscle after workout. Rispatory system clean . This is one awesome product thanks. How much for the water in front upgrade model?

This is the first time I have use or purchased a machine that concentrates oxygen, it works to my satisfaction. I bought it for general recovery and it works great for me.

Hello I have been eager to use my new oxygen concentrator because I just had open heart surgery and I need one to sleep. So about 16 days ago I bought one from you guys. But it never showed up. USPS does not deliver to my address but FedEx and UPS does. But I did not know that until the shipment was returned to sender in Los Angeles. I live in Oregon and I'm concerned that this problem will prevent me from having oxygen and I've already paid $200 for it plus $30 shipping. I've been in touch with your customer service top service or something like that and they have replied a couple times but it seems like they dropped my case or something I don't know.
The oder # is DLZ#6363 and was ordered on 9/11. On 9/16 it was received here in Bend and sent back to Los Angeles. I've been trying to work with your customer service but I seem to have lost contact with them. If you could help me or direct me to a place where I can get satisfaction from my purchase I would greatly appreciate it. My email address is k r a s h b a u g h [****]. I know this is not the correct forum for addressing this kind of issue but I haven't heard back for a few days from your customer service. And I don't know what else to do. I don't want to lose my $230. The last message I got from them said they understand and I gave them my new good address and a couple days after that I texted and and they said they forgot to send it but they're going to send it now so I verified my new good address again and I haven't heard anything so please let me know. I'm sorry to bother you this way thank you