Close Up of Wearable Device (IMAGE) University of California - San Diego Caption The system is made up of a custom circuit board, a battery and off-the-shelf electrodes encased in a 3-D-printed case. Credit University of California San Diego Usage Restrictions Please credit University of California San Diego 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.