Mineral Glass Water Resistant Case / bezel material: Stainless steel Stainless Steel Band One-touch 3-fold Clasp Regular timekeeping Analog: 2 hands (hour and minute), 1 dial (second) Accuracy: ±20 seconds per month Approx. battery life: 3 years on SR621SW Size of case: 36.6 × 26.6 × 7.8 mm Total weight: 62 g