The Philips One Blade is a revolutionary new electric grooming technology designed for men who wear facial styles and grow beards. One Blade is designed to trim, edge and shave any length of hair. The unique One Blade shaving technology integrates a fast moving cutter with a dual protection system. The blades are designed for lasting performance. For optimal performance, you will only need to replace the blade every 4 months. Replacement is easy and hassle-free.