If you own one of Fitbit's Sense smartwatches, there's a chance the company is going to email and ask that you send it back to them due to a hardware problem.
As The Verge reports, Fitbit discovered there's a hardware issue on a "limited number" of Sense devices related to the functionality of the eletcrocardiogram (ECG) feature. It means that the ECG app can display an "inconclusive" result to the user, which clearly shouldn't happen, and needs to be fixed.
If you are one of the unlucky few to own a faulty Sense, as explained on the Fitbit forums, the company will provide you with a prepaid return label to send the smartwatch back to them. A free of charge replacement will be sent out to you, but keep hold of the original accessories as they aren't being replaced.
The Sense is Fitbit's premium smartwatch offering. When PCMag reviewed it, we found a watch with an attractive design, excellent battery life, and a range of useful fitness features including that ECG function. However, it's expensive at $330 and the touchscreen could be better, but its focus is in the right place on "your well-being with the ability to measure and monitor your stress, heart rhythm, skin temperature variation, and blood oxygen saturation."