Product Description Specifications Movement Caliber Number V158 Movement Type Solar Accuracy ±15 seconds per month Duration Operating for approx. 10 months (when fully charged) Exterior Case Material Stainless steel Crystal Hardlex LumiBrite Lumibrite on hands and indexes Clasp Three-fold clasp with push button release Other Details Water Resistance Splash Resistant Case Size Thickness: 9.2 ㎜Diameter: 37.4 ㎜ Other Specifications Screw case back Other Features Day/Date display Overcharge prevention function Quick-start function