A few weeks ago, to get ahead of the coronavirus scare, just in case, I ordered a pulse oximeter from Amazon.com. It arrived today. Here is one side of the package.
Will it give an accurate reading? Who knows. But you've got to hand it to China, I guess, for spreading this virus worldwide including via air travelers to the United States and then being in the business of making money by selling Americans electronic devices to monitor our declining lung capacity. At least I can still breathe well enough to laugh at the ironies here.