This product is not a medical device. It is a health management device from OXITECH, equipped with a self-check function. It can measure blood oxygen saturation and pulse rate. Although it is listed as an outdoor product, it can of course be used at home. A small compass is attached. The box is damaged. There are some scratches on the surface of the device, but no noticeable stains. Please refrain from purchasing if you are concerned about minor details.