The Philips Norelco OneBlade has a revolutionary new technology designed for facial styling and body grooming. It can trim, edge and shave any length of hair. Its dual protection system a glide coating combined with rounded tips makes shaving easier and comfortable. Its shaving technology features a fast-moving cutter (200x per second) so it's efficient - even on longer hairs. The blades are designed for lasting performance. For optimal performance, you will only need to replace each blade every 4 months. Replacement is easy and hassle free.