Romulo C.

Their website tells you that they have a 30 day money back guaranty. I Purchased a Checkme O2 Max Wrist Oxygen Monitor, I tested it for a week against a hospital pulse oximeter (UC Davis MC) and a commercially available duckbill pulse oximeter (from Amazon). The sensor was placed on the same finger all the time. The Checkme O2 Max Wrist Oxygen Monitor would always read 4-6 points (SPO2) lower than both above mentioned pulse oximeter. I reported this to their customer support and requested a return authorization for their defective product. I have sent several emails and as to date, they have not given a return instruction or RMA number. Their latest excuse was that their warehouse is moving. I have written an honest review of the above product then after a couple of days, it was removed.