Dagadam smart bands. Dagadam's Official Website and Shop: https://dagadam.com
Description: Dagadam changeable smart-bands can add special functions. They connect with the watch via the two connectors and make available the function attributed to that band model. Both parts of the band can have a different function/attribute. The function/attribute can be a barometer, camera, sim card, memory card, flexible battery, GPS, more accurate HR, ECG etc.. Patenting in progress.