1. Optical handpiece, more convenient for clinical operation. 2. Automatic frequency tracking ensures that the machine always works on the best frequency and performs more steadily. The optional function: automatic water supply system. 3. The handpiece is detachable and can be autoclaved to the high temperature of 135°C and pressure of 0.22MPa. 4. Digital controlled, easy operation and more efficient for scaling. 5. The curing light can be used along with UDS-L LED, utilizing its ultrasonic power to provide electricity for the curing light. More convenient and practical.