FingerIO on Smartwatch (IMAGE) University of Washington Caption FingerIO, a new sonar technology developed by UW computer scientists and electrical engineers, allows you to interact with mobile devices and tiny smartwatch screens by writing or gesturing on any nearby surface -- a tabletop, piece of paper or even in mid-air. Credit Dennis Wise, University of Washington Usage Restrictions With credit 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.