Casio Edifice x EFB-680 Series ft. Chronograph Men Formal Hexagon 100m Water Resistant Watch EFB-680D-1A EFB680D EFB680 EFB-680 EFB-680D Experience precision and style with this sleek timepiece, boasting an impressive 3-year battery life, sapphire crystal, and luminous hands. Water-resistant up to 100m, with a durable stainless steel case and comfortable metal band. Perfect for the modern individual seeking a reliable and feature-rich chronograph. Module / Movement 5579 (quartz) Battery Life / Accuracy Approximately 3 years (+/-20 seconds per month) Crystal Sapphire crystal (anti-reflective coating) Luminous Luminous on hands and indexes Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 10.5 mm Diameter: 45.8 mm Length: 48.0 mm Lug width: Integrated Other Specifications Casio Edifice x EFB-680 Series ft. Chronograph Screw case back Chronograph up to 60 minutes in 1/10-second increment (elapsed time, split time) Date display Regular timekeeping (analog display)