Braun Series 7 Electric Shaver for Men with Precision Trimmer, Cordless Foil Razor, Wet & Dry, 100% Waterproof, UK 2 Pin Plug, 70-N1200s, Silver RazorBraun Series 7 electric shaver for men with 360° adaptation for a smooth shave. Features AutoSense technology that reads and adapts to your beard density, removing more hairs in every stroke. The Li-Ion Battery provides up to 3 weeks of shaving and a 5 min quick charge. This men's electric razor is 100 Percent waterproof for wet and dry use. Compatible with EasyClick system. Precision Trimmer attachment included.Braun Series 7 Electric Shaver Replacement Head, Easily Attach Your New Shaver Head, Compatible With New Generation Series 7 Shavers , 73S, SilverWithin 18 months, an electric razor braun shaves an average of 6,000,000 hairs. This leads to gradual wear of the cutting edges, which can result in a less comfortable shave. Therefore braun recommends replacing the foil and knife block of the men's electric shaver every 18 months to keep performance at peak performance. Take care of your electric beard razor and it will take care of you.