One hand is enough: This electric salt and pepper shaker set has gravity sensors and automatically grinds spices when turned over. No need to push or turn the pepper mills: ideal for people with hand and joint pain. No battery included Adjustable size: The adjustable grind levels of our salt and pepper mill set, from fine to coarse, will help you achieve the perfect, even consistency you want. It works well with all kinds of spices, including pepper, salt and grain spices. More flavors: Unlike a regular electric salt shaker or shaker, the ceramic core of these salt and pepper shakers will not alter the flavor of the spices during grinding. It also has an airtight lid that protects its contents from dust and moisture. Made to last: This electric pepper shaker is made of premium acrylic, which is more durable than glass. It will not break if accidentally dropped. Spice residues on the stainless steel lid and the ceramic core are easy to clean with the free brush.