Closeness and skin comfort: the dermatologically tested SensoFlex swivel head and SensoFoil blades are designed to minimize pressure on sensitive skin. Efficient even on tough beards: AutoSense technology reads and adapts power to your beard density, capturing and cutting more hair in every shave. Li-Ion Battery for up to 3 weeks of shaving (50 min). 5 min quick charge for one full shave. 100% waterproof electric razor for Wet & Dry use. Includes a Precision trimmer attachment for moustache and sideburns trimming. Register your product and get 5 years warranty.