The iVac® LED Piezoelectric Ultrasonic Unit. With a modern and innovative design, the iVac® piezo was designed to meet the demands of dentists with the best conceivable ultrasonic source performance. With a lightweight handpiece, LED light source, and adaptive vibration system, which automatically calculates the best frequency for each type of insert and application, the iVac® piezo features an easy-to-operate touchscreen panel, in addition to being easy to clean.