Casio G-Shock GM-2100-1ADR Grey Resin Men's Analog-Digital Watch

The Casio G-Shock GM-2100-1ADR is a men's analog-digital watch with a grey resin case and strap, made for everyday durability and active use. Its round 44 mm case gives it a bold profile, and the shock-resistant build suits swimming, travel and outdoor routines.

The Casio G-Shock GM-2100-1ADR men's watch pairs a traditional analog display with a digital screen, so you can read the time at a glance and still use timing tools. A double LED light brightens the face in low light, while the alarm, calendar and world time functions cover daily reminders, date checks and travel across time zones. The stopwatch and timer help with workouts, cooking and other timed tasks, and 200-meter water resistance supports swimming and snorkeling rather than scuba diving. Resin keeps the watch light on the wrist, and the grey finish gives it a practical, understated look.

Key features and benefits of the Casio G-Shock GM-2100-1ADR

• Grey resin case and strap: Resin is a lightweight material that resists impacts and everyday wear. The grey finish keeps the watch comfortable for long days and simple to match with casual clothing.
• Shock resistance: The build is designed to handle knocks and bumps during active use. That makes the watch a practical choice for outdoor tasks, sport and busy days.
• 44 mm round case: The 44 mm case gives the watch a bold presence on the wrist. Its round shape keeps the look familiar and easy to read.
• Analog-digital movement: Hands show the time in the traditional way, while a digital display adds extra information. You get the clarity of an analog face with the utility of digital readouts.
• 200-meter water resistance: The watch has 200-meter water resistance, which suits swimming and snorkeling. It is not rated for scuba diving.
• Double LED light: The double LED light illuminates the face for reading in low light. This helps when you check the time in a dark room, tent or car.
• Alarm: You can set a daily alarm at a chosen time. It works as a quiet reminder or wake-up signal without needing your phone.
• Calendar: The watch shows the day, date and month automatically. That saves you from checking a separate calendar during the day.
• Stopwatch and timer: The stopwatch measures elapsed time, and the timer counts down a set period. Both are useful for workouts, cooking or timing tasks at work.
• World time: World time shows the time in major cities around the globe. It helps when you travel or need to call someone in another time zone.
• 1 Year International Warranty: The Casio G-Shock GM-2100-1ADR comes with a one-year international warranty that covers manufacturing defects. Keep the warranty information with your purchase details.

Who the men's watch is for

The Casio G-Shock GM-2100-1ADR men's watch suits men who want a tough, useful timepiece for daily wear rather than a delicate dress watch. Its resin build and 200-meter water resistance make it a sensible companion for active routines, travel and work where knocks and splashes are part of the day. The analog-digital layout also helps if you like a traditional dial but rely on a stopwatch, alarm or world time.

• Everyday wear when you want a watch that handles bumps and splashes without fuss.
• Hiking, camping or running, where shock resistance and a stopwatch are useful.
• Travel, with world time and an alarm for schedules across time zones.
• Swimming or snorkeling, thanks to 200-meter water resistance.
• Work settings that involve movement, outdoor tasks or frequent hand use.

Less suitable if: you prefer a purely analog watch or a formal, dress-style timepiece. The Casio G-Shock GM-2100-1ADR is built around a rugged resin case and a hybrid display, so it leans practical rather than formal.

Men's watch specifications

Using and caring for the Casio G-Shock GM-2100-1ADR

The resin case and strap on the Casio G-Shock GM-2100-1ADR are straightforward to maintain. Wipe the watch with a damp cloth after everyday wear, and rinse it with fresh water after swimming in saltwater to help prevent corrosion. Avoid extreme temperatures and harsh chemicals, and press the buttons gently so the controls stay reliable.

• Use a damp cloth for routine cleaning of the resin case and strap.
• Rinse with fresh water after saltwater swimming.
• Keep the watch away from extreme heat and chemicals.
• Press the buttons gently and store the watch in a dry place when not in use.

How to choose the right men's watch

Choosing a men's watch for active use comes down to case size, materials, movement and functions. The Casio G-Shock GM-2100-1ADR has a 44 mm round resin case, so it offers a bold fit and a light feel on the wrist. Its analog-digital movement gives you hands plus a digital display, and its feature set covers alarm, calendar, double LED light, stopwatch, timer and world time. If you need a watch for swimming, the 200-meter water resistance is the key figure to check; if you prefer a formal dress watch, a slimmer analog design may suit you better.

Frequently asked questions

What is the Casio G-Shock GM-2100-1ADR made of?

The Casio G-Shock GM-2100-1ADR has a grey resin case and a resin strap. Resin keeps the watch lightweight while giving it resistance to impacts and everyday wear.

What size is the Casio G-Shock GM-2100-1ADR?

The case measures 44 mm across and has a round shape. That size gives the watch a bold look, so it suits people who like a larger watch on the wrist.

Can I swim with this watch?

Yes. The Casio G-Shock GM-2100-1ADR has 200-meter water resistance and is suitable for swimming and snorkeling. It is not rated for scuba diving.

What functions does the analog-digital display offer?

The analog-digital movement combines watch hands with a digital screen. You get an alarm, calendar, double LED light, stopwatch, timer and world time alongside the main time display.

Does the Casio G-Shock GM-2100-1ADR work for travel?

World time shows the time in major cities around the globe, which helps when you cross time zones. The alarm and calendar add useful support for schedules and dates while you are away.

Who is the Casio G-Shock GM-2100-1ADR designed for?

It is a men's watch made for people who want a robust, practical timepiece for daily wear, outdoor activity and travel. The resin build and 200-meter water resistance fit active routines better than a formal dress watch.

Is there a warranty on this watch?

The Casio G-Shock GM-2100-1ADR comes with a 1 Year International Warranty covering manufacturing defects. Keep the warranty details with your purchase information.

Does it have a light for reading in the dark?

Yes. A double LED light illuminates the face so you can read the time in low light. This is useful in dark rooms, tents or cars.