Requires 4 AAA batteries. Functionality confirmed. I cleaned it as thoroughly as possible, but please be aware that some salt residue may remain. Please consider this before purchasing. Width: 6cm Depth: 5.1cm Height: 18.8cm A modern pepper mill made of stainless steel and plastic, with adjustable grind settings and battery operation. - Material: Stainless steel and plastic - Design: Modern cylindrical shape with a transparent viewing window - Functionality: Adjustable grind settings for pepper - Power Source: Battery-operated - Control: On/off switch located at the bottom Thank you for viewing.