Furthermore, I want to clarify that this product is not a true dual-frequency device. Your company is aware of this, but you're trying to sell it as dual-frequency, which is why we're receiving more and more complaints. The above explanation is merely a vague and unavoidable attempt to clarify the situation.
By vevor
The nameplate indicates a transducer main frequency of 40kHz.
FULL mode operates at approximately 28kHz with 100% power, suitable for rougher, dirtier items requiring more forceful cleaning. SEMI mode operates at approximately 40kHz with 50% power, suitable for finer items requiring less forceful cleaning.
By vevor