Moticon sensor insoles use Bluetooth Low Energy technology for transmitting data to a mobile phone or tablet. The sensor insoles require a simultaneous and synchronuous data transfer from 2 devices (left & right) at a high sample rate of up to 100Hz. This is why a proprietary transmission profile is used. Hence, it is not possible to use one of the standard Bluetooth profiles, e.g. heart rate, and stream the data to a smart watch or similar devices. Check this site to learn more about related topics.