This G-SHOCK timepiece features a Carbon Core Guard structure that combines high strength with a lightweight design. The fine resin case contains carbon fiber to prevent impact damage and deformation while protecting the internal module.

A dual-layer back cover guards against impacts to the rear, while the shock-proof button configuration allows for an exterior design without button guards. The watch face is styled with a three-dimensional dial and large front buttons for a bold aesthetic.

Engineered for toughness and outdoor utility, this analog-digital model provides 200-meter water resistance and a double LED light system for clear visibility in dark conditions.

Key Features

Case size (L× W× H)	48.5 × 45.4 × 11.8 mm
Weight	51 g
Case and bezel material	Carbon / Resin
Band	Resin Band
Construction	Shock Resistant, Carbon Core Guard structure
Water resistance	200-meter water resistance
Power supply and battery life	Approx. battery life: 3 years on SR726W X 2
Glass	Mineral Glass
Compatible band size	145 to 215 mm
World time	World time 31 time zones (48 cities + coordinated universal time), daylight saving on/off
Stopwatch	1/100-second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, split time, 1st-2nd place times
Timer	Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
Alarm/hourly time signal	5 daily alarms, Hourly time signal
Light	Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Light color	LED:White
Calendar	Full auto-calendar (to year 2099)
Mute feature	Button operation tone on/off
Accuracy	Accuracy: ±15 seconds per month
Other features	12/24-hour format, Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.), Regular timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day) Digital: Hour, minute, second, pm, month, date

Highlights

Shock resistant
20 bar water resistant
Easy to see in darkness
Casual design
Light and strong
Sporty design

Frequently asked questions

What is the water resistance rating of this watch?

This watch has a 200-meter (20 bar) water resistance rating.

What materials are used for the case and band?

The case and bezel are crafted from carbon and fine resin, paired with a durable resin band and mineral glass over the dial.

What are the dimensions and weight of the watch?

The case measures 48.5 × 45.4 × 11.8 mm, and the total weight is 51 g.

What type of illumination does the display have?

It is equipped with a double white LED light (Super Illuminator) for both the analog face and the digital display with selectable illumination durations.

What is the expected battery life?

The approximate battery life is 3 years using two SR726W batteries.

What wrist sizes does the band accommodate?

The compatible band size ranges from 145 mm to 215 mm.

Casio G-Shock Carbon Core Guard Red Dial Digital Watch GA-2100-4ADR