It is mainly made of 3Cr13, 4Cr13 martensitic stainless steel.
The choice of electric shaver must be based on the hardness and density of the individual beard. A reciprocating shaver is recommended for thick and hard beards.
Your face will expand slightly after washing your face, so it is best to shave before washing your face. After getting up in the morning and before washing your face, it is an ideal time to shave. When using a retinal shaver, keep the shaver perpendicular to your face and at a 90-degree angle. Hold the electric shaver in the direction, because the beard grows downward, and shaving in the reverse direction can make the stubble stand up and be easy to shave, so when shaving, it should be shaving from the bottom to the top.