Razor Remington F4000 Style Series Foil Shaver F4:The Planetary shaver is waterproof, so you can even take it in the shower. You can monitor the battery level because the shaver has an LED indicator. Because of the built-in battery, the Remington F4000 Style Series Foil Shaver F4 can be used anywhere. On a single full battery, the Remington shaver will run for 45 min. This will surely be enough time for a thorough shave. The shaver is designed for dry shaving. Remington F4000 Style Series Foil Shaver F4 Planchet Shaver Key Features Powered by integrated battery Suitable for dry shaving hairs The shaver is completely waterproof The design also includes a practical trimmer Adjustable lengths of extensions: 1,5 mm Remington shaver will last 45 min on one fully charged battery A full charge takes 4 hr(s)