3 ms·How does the watch differentiate ambient temp from wearer's temp?by mc32 4y agoHow does the watch differentiate ambient temp from wearer's temp?lupire 4y agoCalibration and ML. Like an infrared forehead thermometer.mc32 4y agoMaybe, but the watch can be enclosed up a sleeve, in a car, in an office, house, direct sunlight, in the shade... Good if it takes all that into account.