It has a ceramic grinding mechanism that adjusts the grind from fine to coarse simply by turning the knob on the top. Just flip it over and let gravity do the rest... just like magic. Handy size, lightweight, for easy one hand operation.  Made of heavy duty plastic/acrylic. Color is a stainless steel chrome look with, a see-through pepper chamber. It's 8 1/2 inches tall with a diameter of 2 1/2 inches at the base. Powered by 6 AAA batteries. (Not included) Comes with a one year warranty from Trudeau. Also available is a matching salt mill.

Trudeau Graviti Elite Pepper Grinder Mill