Thanks for the test.
They also use 100W of ultrasonic power: https://www.sciencedirect.com/science/article/pii/S135041772... and a cursory search says this is the domain of more expensive ultrasonic cleaners (> 100$).
They also use 100W of ultrasonic power: https://www.sciencedirect.com/science/article/pii/S135041772... and a cursory search says this is the domain of more expensive ultrasonic cleaners (> 100$).
0: https://www.aliexpress.com/w/wholesale-ultrasound-transducer...