Electric shaver with SensoFlex: the dermatologically tested flexible shaving head adjusts for minimal pressure on sensitive skin The SensoFoil blades are specially designed for a close, comfortable shave Li-Ion battery for up to 3 weeks of shaving (50 min). Charge 5 minutes for one full shave 100% water resistant electric shaver for wet and dry use Includes a precision trimmer attachment for mustache and sideburn trimming