Park-closeup (IMAGE) Texas A&M University Caption Dr. Sung II Park's paddle-shaped device consists of a harvestor that contains microchips for wireless communication. The harvestor also produces currents to power LEDs inserted near the end of the shaft. Credit Texas A&M University College of Engineering 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.