Bests & Worsts Reviews from Amazon

Me husband and I had covid, I ordered this and it came the next day. His oxygen levels were so low. I took him to the emergency room and he was life flighted to another hospital. He didn't want to go. Because we had this device and I explained to him that the numbers meant, he agreed to go to the hospital. He was there for two weeks, I went in about a week after he did. This works great, easy to read and pretty accurate. We've since made a full recovery.