Bodum Bistro Automatic Gravity Activated Salt and Pepper Grinder, Red Automatically activates once the grinder is tilted to a 45-Degree angle The grinder works for other spices as well Durable ceramic grinders can be individually adjusted for different grind settings on both the salt and pepper Comes prefilled and is easily refilled by lifting the cap of the grinder Battery operated, 6-AAA batteries not included