The shaving head of the Remington Ultimate series F9 has 4 shaving blades and is flexible. This way you can easily control a heavy beard growth with this shaver. The LiftLogic technology first lifts the beard hairs, then they are shaved off. This ensures a smooth result, without skin irritation. You use this shaver dry, with foam or in the shower. It is just what you like best. The useful life is 60 minutes and the remaining minutes are read on the LED display. Charging takes 90 minutes. Or enable the fast charge function; then the shaver is ready to use for 1 shave within 5 minutes.