use the adjustment key or screwdriver to adjust the "ten" hole on the side of the body, slowly reduce the sound to the appropriate state, and do not adjust too small. If the adjustment is too small, the power is insufficient. 4. The small blade will fall off during haircut. This situation is that the tongue with the small blade is short. Solution: A. Remove the blade and there are several holes behind the lower cover of the fuselage, one of them is blocked with a small black plug, pick out the small plug with a needle, and then twist the screw with a screwdriver. We can see that the tongue becomes longer, and then install the blade.