The Philips One Blade is a revolutionary new electric grooming technology designed for men who wear facial styles & grow beards. One Blade is designed to trim, edge & shave any length of hair. The unique One Blade shaving technology integrates a fast moving cutter (200 x per second) with a dual protection system – giving you an efficient, comfortable shave on longer hair. One Blade does not shave too close – so your skin stays comfortable Get a perfect edge on your style with the dual-sided blade. You can shave in either direction to get great visibility & see every hair that you’re cutting. It stays comfortable even in sensitive areas, so it’s fast & easy to line up your style in seconds. Trim your beard to a precision stubble length with one of the 3 included stubble combs. 1 mm for a 5 o’clock shadow, 3 mm for a tight trim & 5 mm for long stubble. The blades are designed for lasting performance. For optimal performance, you will only need to replace the blade every 4 months*.