Excellent, high-quality oxygen concentrators 5 Liter capacity Single flow, real-time alerts, very high oxygen flow rates. Optional add-on of ongoing real-time monitoring through-out the use. Has CE, tens of thousands of units deployed successfully all over the world. Supplier and model of choice by Clalit Medical, one of the world's largest home-care delivery health systems, and Israel's largest HMO. See more details here: https://www.flipsnack.com/cov2020/oxytec-brochure-updated.html