Casio G-Shock GWG-2000-1A1 GShock GWG2000-1A1 GWG2000

Features
Take on the toughest terrain with the G-SHOCK MUDMASTER, designed to handle the harshest, roughest on-land environments.
This shock-resistant watch is constructed to withstand all the mud and sand your adventures may bring, and it leverages our latest exterior technology to deliver a smaller profile with an even better fit.
This compact design is made possible by the forged carbon bezel, carbon core guard case structure, and mud-resist buttons combined with stainless steel pipes and silicone buffers. Finely powdered carbon fiber is kneaded into resin, then heat-pressed to mold a bezel that is more complex, yet even stronger than before.

Specifications:
Diameter : 54.4mm
Case / bezel material: Resin / Stainless steel
Resin Band
Neobrite
Screw Lock Crown
Carbon Core Guard structure
Mud Resistant
Shock Resistant
Sapphire crystal with glare-resistant coating
Gray ion plated bezel
200-meter water resistance
Tough Solar (Solar powered)
Double LED light
Low-temperature resistant (–10°C/14°F)
Time calibration signal reception
Time Calibration Signals
The auto hand home position correction
Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement))
Digital compass
Altimeter
Barometer
Thermometer
World time
1/100-second stopwatch
Countdown timer
5 daily alarms
Hourly time signal
Battery level indicator
Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
Full auto-calendar (to year 2099)
12/24-hour format
Button operation tone on/off
Regular timekeeping
Accuracy: ±15 seconds per month (with no signal calibration)
Approx. battery operating time:
6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
25 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Size of case : 61.2×54.4×16.1mm
Total weight : 106g