The incredibly thin Stiletto series is the flagship of the Citizen Eco-Drive line - Sleek, thin and refined and no batteries to change ever. Solid Stainless Steel Case and Bracelet with Gold-Tone Accents Bracelet has push-button deployment clasp Sapphire Crystal is Virtually Scratch-Proof Water Resistant to 30 Meters Low-Charge Indicator and Time-Reset Advisory - the second hand will move in 2 second jumps to indicate that it needs a charge Never Needs a Battery - Charges in sunlight or indoors as you wear it. When Fully Charged, it will run for 180 days without additional exposure to light (180 Day Power Reserve) Approximate case width 35 mm (1 3/8 inches) not including setting crown