Motorola has presented two Moto Mods at the MWC for its smartphones. The Health Mod can measure vital signs such as blood pressure, temperature, and oxygen saturation. A Moto Mod with a full-sized QWERTY keyboard was also shown.
https://www.notebookcheck.net/Motorola-shows-Moto-Mods-for-measuring-vital-signs-and-a-full-sized-physical-keyboard.286516.0.html