Casio G SHOCK Black Resin Digital Men's Watch GWB5600HR 1D Triacetate Polarize creating a clean and sharp 25200399 creating a clean and sharp aesthetic This means it is suitable for water sports and wearing in the surf and diving battery operating time: 10 months on rechargeable battery (operation period with normal use without exposure to light after charge) 22 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy Accuracy: ±15 seconds per month (with no signal calibration and mobile link function) Other features 12 24 hour format Date month display swapping Day display (days of the week selectable in six languages) Regular timekeeping: Hour World Time setting for approximately 300 cities and user's original 5 cities