With approximately 100 high-speed sonic vibrations per second, this product reduces resistance against the skin for a gentle shave. Because the blade has less direct contact with the skin, it is characterized by its low burden on the skin. To make it easy to use for those with sensitive skin, a guard that pursues a comfortable feel against the skin is equipped. The blades are replaceable, and the blade tips can be washed with water for hygiene. It comes with a cap, making it convenient for carrying. ⚠️ Batteries are not included. Please purchase one AAA battery.