This unique clock features a 16" frame made of spun steel, finished with an antique brass patina. The hour and minute hands point to the outer time scale providing your local time and world time. The map rotates clockwise, and the 24 color-coded arrows point to the inner time scale which allows you to read the 24 inner time zones around the world at once. The inner time scale also indicates daytime and night time. Operates off one 'AA' battery. Easy to set and maintain.