The modeling uses the architectural features of the Sydney Opera House, such as the huge shells on the seaside reef, and the boat sailing in the wind; the shape of the finger holder combined with ergonomics, the design conforms to the comfortable radian of the human body's fingers, and the built-in silicone film is not sensitive to monitor blood oxygen. Using reflective infrared light technology, through the brightness of finger skin and musculoskeletal tissue, the blood oxygen saturation and pulse of the human body are accurately detected, and the physical condition of the elderly is monitored anytime and anywhere. (Patent filed)