Core Features of the Casio G-Shock Carbon Core Octagon:

• G-Shock watches are water-resistant up to over 10 bars or 100 meters.
• The hands and the indices of the models are luminescent.
• This watch pays homage to the original model through its retro-inspired octagonal bezel.

Model Specifications: GM-2100B-3AER

• The grey case of the watch is made of resin with a stainless steel bezel.
• A green resin strap secures the watch. 
• The green dial gives the watch its high-tech appearance. The model also features a digital display. 
• A hard glass mineral crystal encases the dial.
• Amongst the many functions featured on the watch are an alarm, a day and date, an LED backlight, a dual time and a stopwatch function alongside a world timer.
• Movement Type - Quartz

• Warranty- 1 year International Warranty