The Remington Ultimate series F7 has flexible shaving blades for a perfectly smooth shave. And if you want to come all the way neat, you will also get started with the detail trimmer. You use this trimmer to update your sideburns, mustache or neck hair. Do this dry, with foam or in the shower. This shaver is 100% watertight. The maximum battery life of 50 minutes is long enough for multiple shaves. Have you forgotten to recharge? No problem; enable the fast charge function and within 5 minutes the shaver has enough power for 1 shave.