The Casio G-SHOCK GA-2100BM features an octagonal bezel paired with a dial finished in metallic vapor deposition and a translucent resin band. Vapor deposition gives the dial, watch hands, and indexes a metallic shimmer that complements the analog-digital design.

Clear translucent resin is used for both the bezel and band, creating a see-through design that lets the inner case show through. The watch is built with a Carbon Core Guard structure for shock resistance.

Equipped with Super Illuminator double LED light for clear visibility in the dark, this timepiece also features 200-meter water resistance, world time across 31 time zones, a 1/100-second stopwatch, and a countdown timer.

Key Features

Brand	Casio
Model	GA-2100BM-7A2
Collection	2100 Series
Case Size (L × W × H)	48.5 × 45.4 × 11.8 mm
Weight	51 g
Case and Bezel Material	Carbon / Resin
Band Material	Resin Band
Construction	Shock Resistant, Carbon Core Guard structure
Water Resistance	200 m (20 bar)
Glass	Mineral Glass
Compatible Band Size	145 to 215 mm
Power Supply and Battery Life	Approx. battery life: 3 years on SR726W X 2
World Time	31 time zones (48 cities + coordinated universal time), daylight saving on/off
Stopwatch	1/100-second stopwatch
Timer	Countdown timer (up to 24 hours)
Alarm / Hourly Time Signal	5 daily alarms, Hourly time signal
Light	Double LED light (Super Illuminator, White)
Calendar	Full auto-calendar (to year 2099)
Accuracy	±15 seconds per month
Other Features	Neobrite, 12/24-hour format, Hand shift feature, Button operation tone on/off

Highlights

Shock resistant
20 bar water resistant
Easy to see in darkness
Transparent color

Frequently asked questions

What is the water resistance rating of this watch?

This watch features 200-meter (20 bar) water resistance.

What materials are used for the case and band?

The case and bezel are crafted from carbon and resin with a Carbon Core Guard structure, paired with a translucent resin band and mineral glass.

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 watch have?

It features a white Super Illuminator double LED light for both the analog face and the digital display with selectable illumination duration and afterglow, along with Neobrite.

What is the expected battery life?

The watch has an approximate battery life of 3 years on two SR726W batteries.

What wrist sizes are compatible with the band?

The compatible band size ranges from 145 to 215 mm.

Casio G-Shock Blue Dial Digital Watch GA-2100BM-7A2DR