Hello! I would like to ask if anyone have had or worked with this ultrasonic device? I am a doctorate student and I have this device in the lab, unfortunately the technical datasheet is not available and I really need the information. In the first photo, Does anyone know what the numbers (50, 100, 150 and 200) in the panel mean and what units are? the "power level increase" is used to increase these numbers.

Additionally there is a switch that can be put in low or high but again I am not sure what it is referred to.

The only info I could find so far on internet was the second photo which is supposed to be the technical parameters but it is extremely blurry and I cannot read it. I tried to contact the manufacturer but they stopped producing these devices and I unfortunately I did not get any answer. If someone has any clue or advice please do not hesitate to let me know thanks a lot!!