This G-Shock GWG2000-1A1 Master of G Mudmaster is a shock-resistant piece that is made to withstand the toughest on land conditions. It is constructed to endure mud and sand that your adventures may bring. It has a compact design, with G-Shock’s latest exterior technology, the watch has a smaller profile which delivers a snug and comfortable fit. It is crafted with carbon bezels, guard case structure and mud-resistant buttons. This watch is perfect for go-getters who need a watch that will hold up through anything and everything. - 61.2 × 54.4 × 16.1mm Case Size - 106g Weight - Resin/Stainless steel Case and Bezel - Resin Band - Shock Resistant - Mud Resistant - Carbon Core Guard structure - 200 Meters Water Resistant - Time adjustment: Radio-controlled Watch; Multi band 6 - Tough Solar (Solar powered) - Digital compass - Altimeter - Barometer - Thermometer - Sapphire crystal with anti-reflective coating - Screw Lock Crown - World time: 29 time zones (29 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping - Stopwatch - Timer - Alarm/hourly time signal: 5 daily alarms - Double LED light - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Power Saving (display goes blank and hands stop to save power when the watch is left in the dark) - 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) - Accuracy: ±15 seconds per month (with no signal calibration) - Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement)) 12/24-hour format - Regular timekeeping: *Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) *Digital: Hour, minute, second, am/pm, month, date, day