Core Features of the Casio G-Shock:

• G-Shock watches are water-resistant up to and over 10 bars or 100 meters.
• The hands and the indices of the models are luminescent.
• Incredibly durable, the watch is shock-resistant, vibration resistant and centrifugal force resistant.

Model Specifications: GMA-S2100-1AER

• The 42.83 mm case of the watch is made of black resin. Its bezel is also black.
• A black resin strap secures the watch.
• The combination of digital and analogue dials gives the watch its utilitarian appearance. 
• A hard glass mineral crystal encases the display.
• For ease of reading, the watch hands are coated with Neobrite.
• Amongst the many functions featured on the watch are alarms, a calendar and a LED backlight alongside a countdown timer function and a world timer. The model also features a stopwatch function.
• Movement Type - Quartz with an accuracy of  +/- 15 seconds per month
• Warranty- 1 year International Warranty