Poor customer service Although the machine has arrived, and seems to be in good working order, their customer service is an absolute nightmare. Avoid this place like the plague. They are slow to answer their emails and don’t answer the phone because they don’t speak English. I wish I could come here and read the reviews first. Edit: the machine has stopped working and they will do nothing about it.

Dealing with COPD had me stuck at home Dealing with COPD had me stuck at home, feeling pretty low. Then I found TTLIFE’s oxygen concentrator – it changes my life! It's lightweight, quiet, and doesn’t break the bank. Now I’m back to enjoying walks and shopping without worrying about oxygen. Big thumbs to TTLIFE's customer service – you guys great!

Great Product As a COVID survivor Great Product As a COVID survivor, I've come a long way with my recovery, relying on ventilators and oxygen supplementation post-hospitalization. Two years out, and I'm mostly back to myself, though I still need a little help at night. I'm really pleased with the NT-04 oxygen concentrator — it's been a reliable companion through my daily life. Now, I'm looking into getting a portable unit for travel. This device has truly supported my path to getting back to life as it was.

Great concedntrator - so lightweight and easy to take anywhere with you. I needed a concentrator that I could take with me on walks plus my automobile traveling. Lightweight and easy to handle. This NT-05 I purchased fit my budget, as for what I paid, I feel it has a lot to offer. Quiet, easy to use, affordable. I love it.

Order oxygen concentrator December 23… Order oxygen concentrator December 23 2021 received following week damaged. Contacted ttlife several times and sent pictures each time as requested. Now end of March 2022 and told replacement time is expired. I am screwed by another Chinese company.. never order directly from any foreign company. I will always go thru Amazon they have instant refund or replacement. TTLife sicks big time.