Batteries not included. AC Voltage:N/A. Up To 15% Savings Per Cartridge* *Compared To The Fusion Manual 4 Ct. Pack, Based On Manufacturer'S Price To The Reatiler 12 Cartridges = 1 Year Of Shaves** ** Based On Average Days Per Cartridge 1 Precision Trimmer Blade Built Into The Back Of The Cartridge. Perfect For Tricky Places Like Sideburns, Under The Nose, And The Around Facial Hair All Fusion Cartridges Can Be Used With All Fusion Handles