suggest you to change a bit every month Cutting head type: 3 of blade Product specifications: a package containing three segmentShaving method: manual Correct guidance:Between the blade Angle and the arrangement through scientific computing， facial curve fit closely， and make the beard area net， do not need to repeatedly force shave scrapeBlow dry hair should avoid direct beard， moist and use shaving gel firstComply with the blade orientation of vertical shaft Package:1xrazor holder1x4pcs shaving blades