2.Is it necessary to follow the user manual for the conductive wire plugging sequence?

Each set of positive and negative conductive lines corresponding to each output channel, as well as the corresponding plug-in positions, are designed to follow the muscle direction and program effects. For better results, please follow the user manual instructions.

Conduction line: The same conduction line has positive and negative poles. Do not use one on the left side of the face and one on the right side of the face. Do not use one product above the eyes and one product below the eyes.
Electrode probes (operating sticks): Both electrode probes should be used simultaneously on the same side of the face. Do not use one electrode probe on the left side of the face and the other on the right side. Nor should you use one electrode probe above the eye and another electrode probe below the eye.