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