G Shock MASTER OF G MUDMASTER GG1000 1A5 Data Gemstone Emerald featuring an open heart movement and featuring an open heart movement and crafted in Japan The minimalist design is perfect for those who prefer a simple aesthetic Mud Resist construction helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge daylight saving on off • 1 100 second stopwatch • Countdown timer • 5 daily alarms (with 1 snooze alarm) • Hourly time signal • Low battery alert • Full auto calendar (to year 2099) • 12 24 hour format • Button operation tone on off • Regular timekeeping • Accuracy: ±15 seconds per month