Blades are designed for long-lasting performance. Replaceable blade lasts up to 4 months. (Based on 2 full shaves per week. Actual results may vary.). Water resistant, so it is easy to clean; just rinse under the tap. You can shave wet or dry, with or without foam - whichever you prefer. OneBlade Pro has a versatile trimming comb with 12 length-settings from 0.5 to 9 mm, giving you an even trim at exactly the length you want. OneBlade doesn’t shave as close as a traditional blade - so your skin stays comfortable. Go against the grain and shave off any length of hair easily. Rechargeable OneBlade Pro can do it all - trim, edge, and shave any length of hair.