This is a radio controlled chronograph watch. The watch case and bracelet are made out of stainless steel. The watch has a sapphire glass. The watch is not only radio controlled. It is also eco drive. Eco drive is the name Citizen uses for solar watches. No batteries needed anymore. The diameter of the watch is 44mm and the thickness 13mm. The watch is new. You will recieve 2 years international guarantee on it from Citizen Europe.