Horrible customer service and dishonest They are just a bunch of scam artists. We wanted to return an unopened oxygen concentrator and they made the return process so difficult with constant back and forth emails and then demanded that unless the device reached them within 2 days of their final email they would not honor the refund. This company should be shut down.

I was impressed with the customer… I was impressed with the customer service team, they patiently asked me what I wanted and I told them it was for my mom who lives in Florida and has emphysema. Then they recommended a suitable machine to me and provided a good discount to ease my burden. Thank you for their help.

I'm at loss on how to change the filter… I'm at loss on how to change the filter cotton in my NT-02, but after contact their customer service team, they promptly sent me a how-to video. They were both friendly and professional

I love the flexibility my lightweight… I love the flexibility my lightweight concentrator gives me compared to trying to carry a heavy tank of oxygen on my back. Plus, the price was the best I found on the internet. Thanks for being there for me!

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!