To calculate the overall star rating and percentage breakdown by star, we do not use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
This oximeter is horrible. If gives inconsistent readings, often registers pulse readings in the 20's, and has a hard time establishing a reading. To be fair to the monitor, I tried it on several people in my household and experienced the same problems with all of the people. I would pass on this one and look for another brand. If this was five bucks from a flee market I wouldn't have a problem, but for over twenty dollars this products PROVE's to be worthless.
I used this for about 2 months and then it stopped working. I am out of my Amazon return period but the product has a 1 year warranty. Good luck with that because I cannot find anyway to contact the company about the warranty. I looked for their website, but nothing populates. The product itself was great, until it stopped working.
I sent this to my son as he had Covid. It's important to know your oxygen level when stricken with this. It arrived broken and unusable. Thankfully he made a quick and full recovery, but I was very concerned at the time. The shipping was fast and efficient. The box was undamaged. The item was broken and unusable...