From G-Shock, the watch that delivers unmatched toughness, comes a collection of new models that deliver a new level of protection. These watches are designed and engineered for rough and rugged activities. Major features include four large bezel screws and protruding surfaces that divide the bezel & case of watch into four sections for a functional four-point protection. The buttons are among some of the largest in the G-Shock line-up for easy operation. Low-temperature resistance allows operation even under very cold conditions, while moon and tide graphs provide essential information for marine professionals & enthusiasts. The large LCD, which is divided into sections, makes information easy to locate and read whenever you need. - 52.4 × 50 × 17.7mm Case Size - 68.2g Weight - Resin Case, Band and Bezel - Shock Resistant - 200 Meters Water Resistant - Environmental Resistance - Low Temperature Resistant (-20℃) - Approx. battery life: 2 years on CR2025 - Mineral Glass - World time: 29 time zones (48 cities), daylight saving on/off - Moon data (moon age of the input data, moon phase graph) - Tide graph (tide level for specific date and time) - Stopwatch - Timer - Alarm/hourly time signal: 5 multi-function alarms (with 1 snooze alarm) - Flash alert: Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto start - Light: Electro-luminescent backlight - Auto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglow - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Accuracy: ±15 seconds per month - 12/24-hour format - Regular timekeeping: Hour, minute, second, pm, month, date, day