Nuba Series by Guido Venturini. This watch doesn't require a battery to work. It only requires the movement of your arm. This watch features a specialized automatic function that's Powered by Motion, date indicator and silver tone dial, shiny stainless steel case and bracelet. Packaged in signature Alessi gift box. Water resistant up to 100 meters (330 feet). 2 Year Manufacturer's Limited Warranty by SII.