Mineral Glass Spherical Glass 50-meter water resistance Case / bezel: Ion plated Stainless Steel Band One-touch 3-fold Clasp Regular timekeeping Analog: 3 hands (hour, minute, second) Accuracy: 20 seconds per month Approx. battery life: 3 years on SR621SW Size of case:47.3X40.9X8.9mm Total weight: 105 g