Modernhome Gravity-Activated Electric Salt and Pepper Mill Set 2 Piece set designed exclusively for grinding fresh peppercorns and sea salt Innovative gravity sensor initiates automatic grinding when turned upside down Can be switched on and off to prevent accidental dispensing, while reducing mess and conserving battery life Dishwasher safe, 9" tall on a classy black and stainless steel design, with see-through windows for gauging levels 4 AA batteries per mill are required (not included)