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. 

FeaturesDouble Illuminator so that the analog and digital clock is illuminatedShockproofNeo display with fluorescent hands World time function with 29 time zonesStop function – 1/100 seconds – 24 hoursTimer every second up to 24 hours5 daily alarmsHand moving functionKey tones on/offAutomatic calendar with date, month and weekday12-/24-hour formatHard, scratch resistant mineral glassCarbon reinforced resin housingResin bracelet for long durabilityBuckle closure3 years – 1 batteryWater resistance classification (20 bar) according to ISO 2281048.5 mm x 45.4 mm x 11.8 mmWeight: approx. 51 g