Fusion is Gillette's first five-bladed razor, which includes a sixth trimming blade on the back of the cartridge for beards and mustaches. This unique design allows men, both clean-shaven and with facial hair to use the razor. Another great feature is that the razor is shower safe, allowing you to shave when and where you wish. On the Fusion Power model, an indicator light conveniently tells the user when the battery is running low and has an automatic shut-off feature. Product Features: 5 Blade Shaving Surface Technology ... has 5 PowerGlide blades spaced closer together to help reduce pressure - for less irritation and more comfort. PowerGlide Blades ... have a patented blade coating for incredible comfort 1 Precision Trimmer Blade ... built into the back of the cartridge. Perfect for tricky places like sideburns, under the nose, and around facial hair. All Fusion cartridges can be used with all Fusion razors.