This salt and pepper grinder electronic is battery operated and incredibly easy to use with its smart single-hand design so you can season your food with just that push of a button.Rotate that knob on bottom clockwise for a finer grind or anticlockwise for a coarse grind. Utilize safe 304 stainless steel drive shaft to bring spices into wanted granular sizes. Spread freshly ground spices for added flavor and taste. Salt and pepper mill has built-in light to make it easier to add a right amount of pepper or salt to your dish.This electric grinder needs 4xAAA batteries.