Ultrasound Wound Healing Device (IMAGE) Drexel University Caption This battery-powered applicator -- as small and light as a watch -- is the first portable and potentially wearable device to heal wounds with low-frequency ultrasound. Credit Drexel University 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.