Function and casual style, perfectly combined . The G-SHOCK GA-2100-1AER will withstand just about anything you throw at it.The Case is shock-resistant and equipped with scratch-resistant mineral glass. The water resistance makes the watch perfect for free diving without equipment: it is tested to up to 20 bar according to ISO 22810.In addition, it keeps you well informed on hectic days.5 daily alarms, a stop function for your training, the world time function and the automatic calendar keep your everyday life in order.