Four special features and advantages as below compared with the regular reciprocator electric shaver with system outer cutter of foil which is known as brands Braun,Panasonic: 1.The shaver has stronger outer cutter than foil outer cutter. It has longer cutting life and it is not easy broken. 2.It can cut beard which is curly/shorter than 1mm/longer than 1-5mm at same time 3.The shaver's Stainless steel cutter will not cause blight problems to your skin compared with regular foil cutter which is made of Nickel,it will cause irritate or hypersusceptibility to your skin. 4.Ideal for the people wear a big beard which is usually more thick and dense, can shave it easily Two obvious features are as below compared with the rotary shaver with has slot on the outer cutter, such as Philip: 1.The hairs of beard easy go into the out cutter through the slot in one direction.So it is easy to cut the hair of beard cleanly 2.More users friendly and much easier control the cutting direction of shaving,The outer cutter has more touch area with the skin,so it cutting the hair more easy and convenient