Fitbit has issued an urgent recall of all of its Ionic smartwatches amid fears that they could overheat and cause burns to wearers.
According to an announcement made by the US Consumer Product Safety Commission, more than 100 people have reported being burnt by the watch after its battery overheated.
The company has sold about one million of the model in the US and nearly 700,000 internationally - with many users wearing the watch overnight to track their sleeping.
