A first digital potentiometer connected with the control unit and outputting a frequency adjustment signal to the oscillation and driving circuit, a second digital potentiometer connected with the control unit and outputting a power adjustment signal to the oscillation and driving circuit, and an input key connected with the control unit. The ultrasonic generator of the utility model is fully digital, reliable and has strong anti-interference ability. More importantly, it can automatically find the frequency point that makes the input current of the half bridge inverter circuit reach the maximum value.
| Model | Power（W） | Frequency (khz) | Operating voltage | Maximum output current |
| PU-XLB50W | 50 | 25khz,28khz,33khz,40khz | AC110V/220V | 0.33A |
| PU-XLB100W | 100 | 25khz,28khz,33khz,40khz | AC110V/220V | 0.45A |
| PU-XLB150W | 150 | 25khz,28khz,33khz,40khz | AC110V/220V | 0.65A |
