Components of the sensor device (IMAGE) University of Massachusetts Amherst Caption Power from the wrist-worn reader travels to the batteryless tag via the wearer’s skin, activating the tag. The tag then sends information about the wearer’s activity back to the wrist device, also via the skin. Credit Sunghoon Lee Usage Restrictions Only to be used in articles covering the research in this press release License Original 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.