Ring watch silhouette  Stainless steel composition World time 1/100-second stopwatch Hourly time signal 12/24-hour format Mineral glass 200-meter water resistance Auto calendar Battery life: 2 years approx on SR621SW Dial size: L 0.99" × W 0.76" × H 0.24" Weight: 16 grams   Style: crw001-1 Color: Silver Material: Stainless Steel