Better check on their own website, I’ve never used this equipment. I just thought it looked cool and shared it here — they have several videos that got millions of views and lots of positive reviews.

https://lungtankshop.com/faqs/

https://cdn.shopify.com/s/files/1/0710/5934/1603/files/LUNG_USER_MANUAL_SAFETY_GUIDELINES_24082024.pdf