G-Shock is a brand of watches manufactured by Casio, known for its resistance to shocks (e.g. hard knocks and strong vibrations). Its full form is Gravitational Shock. They are designed primarily for sports, military and outdoor adventure oriented activity; nearly all G-Shocks have some kind of stopwatch feature, countdown timer, light and water resistance.

Product Features:

• Mineral Glass
• Shock Resistant
• 200-Meter Water Resistance
• Case / Bezel Material: Resin
• Resin Band
• Led Backlight (Super Illuminator)
• Selectable Illumination Duration, Afterglow
• World Time
• 35 Time Zones (100 Cities Coordinated Universal Time), City Name Display, Daylight Saving On/Off
• 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: 24 Hours
• Countdown Start Time Setting Range: 1 Minute To 24 Hours (1-Minute Increments And 1-Hour Increments)
• 5 Daily Or One-Time Alarms
• Hourly Time Signal
• Mobile Link (Wireless Linking Using Bluetooth® V4.0)
• Vibrator
• Tap Operation
• Low Battery Warning (A Warning Appears On The Display Whenever Battery Power Drops Below A Certain Level.)
• Power Saving (Mobile Link Turns Off Automatically After A Fixed Amount Of Time To Save Power.)
• Full Auto-Calendar (To Year 2099)
• 12/24-Hour Format
• Button Operation Tone On/Off
• Regular Timekeeping: Hour, Minute, Second, Pm, Month, Date, Day
• Accuracy: ±15 Seconds Per Month
• Approx. Battery Operating Time: 2 Years On Cr2032 (Mobile Link Used 12 Hours A Day.)
• Incoming Call Alert: 3 Times/Day
• Incoming Mail, Other Event Alert: 10 Times/Day
• Light: 1 Time (1.5 Seconds)/Day
• Alarm: 10 Seconds/Day
• Size Of Case/Total Weight: 53.2 X 50 X 17.7 Mm/64 G
• LED: White