CONNECTED WATCH WITH ROTATING BEZEL

A portable electronic device configured to be positioned on a users wrist, the portable device being configured to perform an electrocardiogram, ECG, the portable electronic device includes a watchcase, a case back, configured to be at least partially in contact with the skin of the wrist, a glass, a bezel, mounted on the watchcase and surrounding the glass, movable in rotation with respect to the watchcase, a first ECG electrode, made of conductive material, on the case back and configured to be in contact with the skin of the wrist, a second ECG electrode, made of conductive material, on the bezel, an ECG electronic module, electrically connected to the first ECG electrode and the second ECG electrode, and configured to receive and process electrical signals from a user and retrieved by the ECG electrodes, to perform an electrocardiogram.