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G-SHOCK GA-B2100-1AER

£129.00 £141.99

DESCRIPTION

You need a watch that can handle long shifts, daily wear and unpredictable conditions, without slowing you down or needing constant attention.

The G-SHOCK GA-B2100 is built for exactly that. Its Carbon Core Guard structure uses a reinforced resin case to protect the module from impact while keeping the watch lightweight and comfortable on your wrist throughout the day.

With Tough Solar power, it charges from light, reducing the need for battery changes. Bluetooth connectivity keeps your time accurate by syncing automatically, so there is no need to adjust it yourself.

With 200 metre water resistance and a durable build, it is ready for rain, daily wear and demanding environments without compromise.

FEATURES

World Time Function
Access 38 time zones (38 cities + UTC) with automatic daylight saving adjustment and quick home/world time swapping.

Stopwatch & Timer
1/100-second stopwatch with lap and split time tracking, plus a countdown timer adjustable up to 60 minutes.

Daily Alarms
Five daily alarms and hourly time signal to keep you on schedule.

Double LED Light
Super Illuminator LED for both analogue face and digital display, with adjustable illumination duration and afterglow for low-light visibility.

Full Auto Calendar
Pre-programmed calendar up to the year 2099 for accurate date tracking.

Energy Saving Mode
Power-saving function automatically reduces display usage when not in use to extend battery life.

Battery Level Indicator
Built-in indicator keeps you informed of remaining charge.

Extended Battery Life
Up to 7 months on a full charge with normal use, or up to 18 months in power-saving mode.

Reliable Accuracy
Maintains accuracy within ±15 seconds per month without Bluetooth connection.

Hand Shift Function
Analogue hands move out of the way to ensure a clear view of the digital display.

Flexible Display Options
12/24-hour format, adjustable date display, and multi-language day indicator.

TECHNICAL DATA

Dimensions
Case size: L48.5 x W45.4 x H11.9 mm
Weight: 52 g

Materials
Case and bezel: Carbon and resin
Band: Resin band

Construction
Shock resistant construction
Carbon Core Guard structure

Performance
200 metre water resistance
Tough Solar power

Key Features
Bluetooth time adjustment for automatic accuracy
Mineral glass for everyday durability
Neobrite coating for improved visibility

Fit
Compatible wrist size: 145 to 215 mm

DELIVERY AND SHIPPING

Royal Mail Tracked 48 (2-3 Working Days)

Royal Mail Tracked 24 (1-2 Working Days)

Our order cut-off time for same-day dispatching is 12:00 Midday

Your satisfaction is our priority, and we ensure every parcel reaches its destination promptly and securely. See more of our delivery information here

  • Quartz Movement

    Every watch on this list uses a high-precision quartz movement

  • 20 Bar Water Resistance

    Every G-Shock is water resistant to 200 metres

  • Award Winning Resistance

    Built to absorb impact from impacts, vibrations and stress

  • Illumination

    Every G-Shock has a way to read the time in the dark

Most watches aren’t built for Duty.

G-SHOCK is built to take impact, handle pressure, and keep performing when it matters.

Casio GA-B2100-1AER water resistant watch

Solar Powered

Solar-powered timekeeping with Bluetooth keeps the GBM-2100 accurate without constant adjustment. It charges from light, reducing the need for battery changes, while syncing with your phone to keep time precise automatically.

part view of Casio GA-B2100-1AER dial showing analogue hands and digital screen

Strength you can rely on

Carbon Core Guard structure keeps the watch strong while remaining lightweight. The carbon fibre reinforced resin case protects the internal module from knocks and daily wear, making it well suited to security roles and demanding use.

Built for reliability in demanding conditions, this G-SHOCK combines a shock resistant Carbon Core Guard structure with a lightweight design that stays comfortable on your wrist throughout the day.

Tough Solar technology allows the watch to charge from light, helping reduce the need for battery changes over time. Bluetooth connectivity keeps the time accurate by syncing automatically, so you do not need to adjust it yourself.

A clear, high-contrast display with LED illumination ensures visibility in both bright and low-light environments, so you can check the time quickly in any situation.

Designed with practical use in mind, it is well suited to roles where reliability matters, including police, security, and other demanding environments.

Dimensions
Case size (L x W x H): 48.5 x 45.4 x 11.9 mm
Weight: 52 g

Materials
Case and bezel: Carbon and resin
Band: Resin band

Construction
Shock resistant construction
Carbon Core Guard structure

Performance
200 metre water resistance
Tough Solar power

Key Features
Bluetooth time adjustment for automatic accuracy
Mineral glass for everyday durability
Neobrite coating for improved visibility

Fit
Compatible wrist size: 145 to 215 mm

Casio GA-B2100-1AER G-Shock worn on wrist showing everyday tactical use
Casio G-Shock GA-B2100-1AER durable black watch with shock resistant build

Built for long shifts

Stays secure, comfortable, and out of the way you will forget it is even there, whether you are on patrol or handling paperwork.

Side profile of Casio G-Shock GA-B2100-1AER black rugged watch case

“Use this on every shift and it’s taken a fair few knocks already. Still works perfectly and the display is easy to read even at night.”

D. Harris

Specialist operator

“Been through rain, cold and plenty of rough use and it hasn’t let me down. Exactly what I needed"

B. Carter

Response Officer

“Needed something reliable for long shifts and this just does the job. Don’t have to think about it, battery lasts ages and it’s comfortable all day.”

J. paterlle

Security Officer
Customers love G-Shock

MORE FROM G-SHOCK

Explore customer favourites and the full G-SHOCK range, built to handle impact, pressure and daily wear across every model.

Find the right fit for your needs.
★★★★☆

View All G-Shock Watches

Why police choose g-shock

You need gear that works without thinking about it.

G-Shock watches are trusted by officers because they are built to handle impact, long shifts and unpredictable conditions. Shock resistant construction protects against knocks on duty, while 200m water resistance means rain, washing or full submersion is never a concern.

With long battery life or solar charging, you are not dealing with constant maintenance. Clear displays and backlighting make it easy to check the time instantly, even in low light or high-pressure situations.

It is simple. It works. It lasts.

Outdoor ready G-SHOCK watch with water resistance and tough design
Casio

G-SHOCK GA-B2100-1AER

£129.00 £141.99

Colour

Black

Suitable for Women

Yes

Handcuff Key Length

N/A

Handcuff Style

N/A

Ankle Height

N/A

Side Zip

N/A

Waterproof

N/A

Vegan

N/A

Safety Toe

N/A

Anti Puncture Sole

N/A

Certification

N/A

Metal Free

N/A

Earpiece Style

N/A

PTT (Press to talk mic)

N/A

Compatible Radio Models

N/A

Radio Brand

N/A

Battery Type

N/A

No of Lighting Modes

N/A

Lumens

N/A

Torch Type

N/A

Coat Type

N/A

Holster / Pouch Included

N/A

Included Rescue Tools

N/A

Hat Type

N/A

Shirt Type

N/A

Trouser Type

N/A

Volume

N/A

Bag type

N/A

Molle Pouch COmpatible

N/A

Hydration Compatible

N/A

Number of Pockets

N/A

inner Belt Compatible

N/A

Belt Type

N/A

Belt Width

N/A

Buckle Type

N/A

Clip Style

N/A

Keys Included

N/A

Pouch Type

N/A

Attachment Type

N/A

Pouch Size

N/A

Pouch Closure

N/A

Vest Pouches

N/A

Protection Level

N/A

Vest Style

N/A

Season

N/A

Wrist Closure

N/A

Knuckle Style

N/A

Protection Type

N/A

Smart Device Compatible

N/A
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