Silhouette Collection. Eco-Drive Technology - Charges in Sunlight or Indoors - No Batteries to Change. Black Dial with silver tone hands and hour markers. When Fully Charged has a 360 Day Power Reserve. Polished Stainless Steel Case and Bracelet. Push-button jewelry clasp. Scratch-resistant mineral crystal. Water resistant to 30m. Case measures 21mm diameter by 6mm thick.