the oxygen right so this is very interesting physiology in one day we can potentially use this to monitor some of the diseases involved in in human capillary level even some of the diabetic applications we're trying to push this photoacoustic oximetry to the ultimate level right this is the device working at 1 Hertz just for demonstration purposes this is 20 Hertz and we actually work at 200 Hertz at this rate we can see single red blood cells traveling right so you can resolve single red blood cells in real time in