The Fitbit watch Nicola Bulley was wearing still gave a heart rate output for eight days after she drowned, an inquest into her death has heard.
The 45-year-old went missing after dropping her daughters at school and going on a dog walk on January 27 along the River Wyre in St Michael's, Lancashire. Her phone was still connected to a Teams phone call with work and her dog Willow was found nearby.
A huge search operation was launched and the mum of two's body was found in the river about a mile from the bench on February 19.