Eco-Drive Technology allows the watch to charge outdoors or in artificial light so you never have to change a battery! When fully charged it will run for 1 Year without additional exposure to light. (1 Year Power Reserve) Bangle-Style Stainless Steel Case & Bracelet with Jewelry Style Clasp has Gold-tone accents Genuine Mother of Pearl Face Water Resistant to 30 meters (100ft) Mineral Glass Crystal