SKIN-FRIENDLY COMFORT BLADES provide a quick, comfortable trim thanks to unique blade technology with rounded tips that are gentle on skin as you trim Self-sharpening steel blades remain sharp as day one for long lasting performance, no blade oil required. Powerful battery delivers up to 60 minutes of run time. Easily clean blades and guards by detaching from handle and rinsing under water. Unlike competition, no blade oil needed to maintain high quality performance.