Wahl Personal Wet/Dry Battery Trimmer has rinseable rotary head. Rotary head comfortably fits into ears and nose to remove unwanted hair. Also used to trim eyebrow hair. Safe: Removes unwanted hair without nicking or pulling. Hygienic: Professional quality steel cutter blades rinse clean under running water. Trimmer can be used by more than one person. 1 AA battery required.