Traduzione in corso passo 13
This golden donut is likely a streamlined antenna, as we've not seen the fiddly brackets or golden gaskets of yesteryear.
Meanwhile, we've come to the headline feature: new electrical heart sensors (ECG) to complement existing optical sensors.
These electrodes detect tiny changes in electrical polarization across your skin as your heart beats. The S4 then interprets that data to compute and analyze your heart rhythm.