<p>➀ The Karlsruhe Institute of Technology (KIT) has developed the open-source platform 'OpenEarable';</p><p>➁ This platform integrates a variety of sensors in wireless headphones for comprehensive health measurements and security applications;</p><p>➂ OpenEarable 2.0 allows developers to create customized software with over 30 physiological parameters measurable directly in the ear.</p>