300W 28KHZ/40KHZ ultrasonic circuit board
The 300W 28KHZ/40KHZ ultrasonic circuit board includes multiple functional unit circuits that perform their respective functions, making the ultrasonic circuit have the advantages of strong energy, no electric shock during use, protection of the circuit, and frequency tracking. The control circuit outputs a small signal required for ultrasound, which is amplified by an amplification circuit [...]