Everything is OK. TYVM
BIG PROBLEM with the product and the specifications. After assembly, the product works. But I tried to adjust the duty cycle with a frequency of 10 or 20 Hz the adjustment of the duty cycle also changes the frequency. Hard for me to use the product which does not completely meet the specifications: Frequency Range: 5Hz ~ 400KHz (Adjustable) Duty Cycle Range: 2 ~ 95% (Adjustable)