G-Shock takes performance to a higher level with the GA-1100 GRAVITYMASTER. ; Aviation timepiece. ; Shock resistant. ; 200M water resistant. ; Digital Compass: • Measures and displays direction as one of 16 points. • Measuring range: 0 to 359 degrees. • Measuring unit: 1 degree. • 20 seconds continuous measurement. • Hand Indication of North. • Bidirectional calibration. • Magnetic declination correction. ; Thermometer: • Display range: -10 to 60 C (14 to 140 F) • Display unit: 0.1 C (0.2 F) ; Super Illuminator LED. ; World Time • 31 time zones (48 cities + UTC), city code display, daylight saving on/off. ; 5 daily alarms. ; Hourly time indicator. ; 1/100-second Stopwatch: • Measuring capacity: 23:59'59.99'' • Measuring modes: Elapsed time, split time, 1st-2nd place times. ; Countdown Timer: • Measuring unit: 1 second. • Countdown range: 60 minutes. • Countdown start time setting range: 1 to 60 minutes (1-minute increments). ; Auto-calendar (to year 2099). ; 12/24-hour format. ; Button operation tone on/off. ; Accuracy: +/- 15 seconds per month. ; Battery: SR927W X 2. ; This product may have a manufacturer's warranty. Please visit the manufacturer's website or contact us at for full manufacturer warranty details.