Large luminous hands and markers for readability and low-light visibility Pilot's Inner Rotating Slide Rule Bezel is operated by the crown at 8 o'clock Dual Time (GMT time) 180 Day Power Reserve when fully charged Crystal is non-reflective scratch-resistant mineral crystal Stainless Steel Case & Bracelet with matte black ion plating Screw Back Case Push-Button Folding Safety Clasp Time Reset Advisory Low Charge Indicator Window Power Saver Function 200 Meters Water-Resistant with screw-down setting crown Approximate dimensions: 41mm (1 5/8 inches) wide not including setting crown, 12.5mm thick