Smartwatch Health Monitoring Film (IMAGE) University of California - Los Angeles Caption The skin-touching side of the film collects and analyzes the chemical makeup of droplets of sweat. The watch-facing side turns those chemicals signals into electrical ones that can be read, processed and then displayed on the smartwatch. Credit Yichao Zhao/UCLA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.