Accuracy: ±15 seconds/month (non-receiving), Photovoltaic: 12 months (with power saving), Functions: Perpetual Calendar, Time zone difference, Water resistant: 10 ATM Glass: Sapphire glass (anti-reflective coating), Case: Super titanium, Band: Super titanium Additional specifications: nickel-resistant, anti-magnetic Class 1, luminous (hands + indexes) Details: With a case diameter of 38mm, this day and date model is perfect for everyday use. The Eco-Drive radio-controlled watch, which does not require battery replacement or time adjustment, is equipped with a day and date function. It combines excellent functionality with practicality. The case diameter is 38mm, a little smaller than the standard model. It is a good size to fit even those with slimmer wrists. The simple design is perfect for everyday use. The indexes and hands are coated with luminescent paint to enhance visibility.