Dual Foil Technology - Two durable foils for maximum skin contact and a close, comfortable shave. Cutting System: Flex Foil Closer Shave - Precision-engineered for an even, smooth shave. Hold at a right angle to skin, use slow, circular motions on stubborn areas, avoid pressing hard, and stretch skin for in tough spots for optimal results. See user manual for more tips. Travel Lock - A secure switch ensures the shaver won’t turn on and drain the batteries while stored away for travel. Built-In Cleaning Brush: Keep your shaver in top condition with the built-in brush. After each shave, turn off, remove the head assembly, and clean the cutters. Replace the head before the next use. Do not rinse under water. Screens last up to 12 months with daily use. Integrated Head Guard-Protect the shaver head during travel with the integrated plastic guard that slides securely over the foils. Battery-Operated-The battery compartment holds two AAs, and easily slides in and out of the bottom of the shaver when fresh batteries are needed.