A:Answer Hi, there. Yes, Fitbit Charge 6 has an electrical sensors that can detect your heart rhythm. To know more, check out: https://support.google.com/fitbit/answer/14236718
Also, Charge 6 detects that your heart rate is unusually high or low. To get heart rate notification, see: https://support.google.com/fitbit/answer/14237938
If you have any additional questions or concerns, reach us at: https://goo.gle/contactfitbit