3 blades with advanced coating designed to give Mach3®'s best first shave*. Powered vibrations for great comfort. Mach3® pivot technology redistributes excess pressure away from the blades. All Mach3® cartridges can be used with all Mach3® razors. Previously sold as Gillette® M3 power. When vibration slows or stops, replace battery in a dry environment. Do not leave depleted battery in device.