The Remington F3900 uses an advanced Flex & Pivot; technology that means the shaver is able to freely adjust to angles and contours of your face. This multi-directional, pivoting, shaver neck is brilliant on difficult to reach neck/jawline areas and provides you with an effortless, super comfortable shave, every time. Model number: F3900. Mens shaver features: The self-sharpening, titanium coated blades are much harder than steel and ensure a consistent, clean cut, every time. Designed not to go blunt over time, you can be confident in the performance of your shaver every use. A sleek, striking shaver, the f3900 will provide 40 minute of shaving time when fully charged. To ensure your shaver is protected a head guard, perfect for travel, & a cleaning brush are included to keep your shaver in perfect condition. Cordless use. For dry use. 16 hour charge time for 40 minutes usage. Foil system. Washable heads. 1 shaving head included. 2 attachments: . Pop-up trimmer - perfect for sideburns and moustache. 2 pin adaptor. Accessories included: Cleaning brush and headguard. General information: Worldwide voltage. Rechargeable battery powered. Batteries required 1 x rechargeable (included) . Manufacturers 2 year guarantee.