Precise Japan Quartz Movement - Accuracy: ±20 seconds per month Stainless Steel Case and Band, One-touch 3-fold Buckle Release Clasp Mineral Crystal, Analog: 3 hands (hour, minute, second), Approx. battery life: 3 years on SR626SW Water Resistant - 30M Size of case/total weight: 28.5 X 20 X 7.5 mm/43 g