Automatic Operation Electric Pepper Grinder or Salt Mill with Gravity Sensor Switch Gravity operated, no need to press a button or manual grinding, simply turn it upside down and the grinder will automatically start to work. Many grinding levels for your choice allows you to grinder your spices from coarse to fine. You can choose the coarseness of your spice,salt or pepper by turning adjustment knob at the top. Our electric salt and pepper mill with blue LED light, you can makes the spice accurately spread on the food. 【Specifications】 Battery Powered: Each grinder requires 6 AAA batteries (batteries not included). Package Dimensions: 8.3 x 2.7x 2.7 inches. 【Package Includes】 2 x Gravity Electric Salt & Pepper Mill