Powered by light energy 10 month power reserve once fully charged Date calendar 44.5 mm diameter Water-resistant to 30 meters (100 feet) Caliber V157 Made with Swarovski Crystals Swarovski is a registered trademark of Swarovski AG Stainless steel with black ion finish Fold over push button clasp 3 year warranty on manufactory defects First year world wide warranty, 2nd and 3rd year only for USA