Ultra Thin Foil TechnologyYASUN YS5800 electric razor is designed with Ultra Thin Foil Technology which provides a closer shave compared to competition. On top of that, high-quality hypoallergenic titanium plated foil heads reduce irritation to give users a gentle and painless experience. Intelligent Shaving SystemThree floating blades combined with an intelligent anti-pinch system minimizes the risk of nicks and cuts while adjusting to the contours and angles of your face. The middle blade helps pre-trim the longer hairs followed by the side blades to ensure a close clean cut. Safety Lock/Trimmer/Features Built with a simple but effective travel safety lock located on the power switch (three blue indicators) that must be pressed down in order to turn on. Back pop-up trimmer for your beard, sideburns and manscaping needs. Charge light indicator lets users know when its being charged. Comes with a USB charger for convenient charging and cordless use. Powerful Lithium-Ion ba