[Functional watch that can withstand any environment] Citizen's Promaster is a professional watch that specializes in durability and functionality. It is easy to use regardless of the occasion, as it is not only waterproof, but also magnetically resistant and has a durable glass surface. New colors are now available from popular models in the LAND series. [Equipped with Eco Drive, no need for regular battery replacement] Power generation Eco Drive converts a small amount of sunlight and light into electricity. Equipped with Citizen's unique technology that keeps moving with light. [You can check the date and day of the week at a glance] Equipped with a day and date display function, convenient for business situations and everyday use. This is a great feature for working people who work a lot at desks, students who often check dates, and job seekers. [Invention for long-term use] Citizen's original super titanium material is scratch resistant, lightweight, and rust resistant. We sought to improve durability because we wanted it to be used for a long time. In addition to being water resistant to 20 ATM, it also has highly durable glass that is anti-magnetic, anti-nickel, and uses sapphire glass to protect your precious watch from all kinds of situations. [Function/Performance] Accuracy: ±15 seconds/month (when not receiving reception), Photovoltaic generation: 12 months (when power save is activated), Functions: Perpetual calendar, time difference setting function, Water resistance: Water resistant to 20 ATM, Glass: Spherical sapphire Glass (non-reflective coating), case: super titanium, band: super titanium, additional specifications: nickel-resistant, anti-magnetic type 1, luminous (hands + index), screw lock crown, fit adjuster [Eco-Drive Charging] Once fully charged, it will continue to work for a long time. Even when you take off your watch, if you place it in a bright place such as near a window where the sun's rays can shine on the dial, it will keep charging and keep the watch running. *You can also check the estimated charging time from the instruction manual on the manufacturer's website.