Specification Case / Bezel Material: Stainless Steel Leather strap Mineral glass Water resistant to 50 meters With Swarovski® Crystals Super bright LED lighting Time mode: Hands: Three hands (hour, minute, second) Three laps: date, day of the week, 24 o'clock Accuracy: ± 20 seconds per month Estimated battery life: 3 years (using SR920SW) 3 years (using SR621SW) / pointer 3 years (using CR1717 (Light 9 [sec / date])) Size / total weight Dimensions: 41.4 x 35.3 x 11.2mm Weight: 83g