Passive Wi-Fi Phone (IMAGE) University of Washington Caption University of Washington computer scientists and electrical engineers have generated "passive" Wi-Fi transmissions that use 10,000 times less power than current methods. Credit 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.