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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOn a compatible Casio G-Shock DW-5600, the stopwatch, countdown timer, and alarms are controlled with the watch’s buttons. First check the module number engraved on the case back: DW-5600 variants can use different modules, so follow the matching Casio Operation Guide rather than assuming every button sequence is identical. Casio’s manual lookup accepts model or module searches and notes that some products may require a module-number search.
The instructions below follow Casio’s Operation Guide 3229/3421/3489. Casio also publishes a guide for module 3525; use the guide for the number on your watch if its labels or behavior differ.
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How to move between modes
In the 3229/3421/3489 guide, press C to change modes. The sequence includes Alarm, Countdown Timer, and Stopwatch modes. Check the mode diagram and button labels in your module’s guide; pressing C after an operation returns to Timekeeping Mode.
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The stopwatch measures elapsed time, split times, and two finish times. On modules 3229/3421/3489, its maximum range is 23 hours, 59 minutes, 59 seconds. It displays minutes, seconds, and hundredths during the first 60 minutes, then hours, minutes, and seconds.
#1 Best Overall
- Iconic G-SHOCK Square Design – The legendary square case that started it all, delivering timeless style and the rugged durability G-SHOCK is known for.
- Shock Resistant & 200M Water Resistant – Built to withstand impacts, swimming, snorkeling, and demanding everyday use.
- Super Illuminator LED Backlight – Bright white LED with afterglow ensures excellent readability in low-light conditions.
- Essential Digital Features – Includes 1/100-second stopwatch, 24-hour countdown timer, multi-function alarm, flash alert, and full auto-calendar.
- Reliable 5-Year Battery Life – Powered by a CR2016 battery for long-lasting performance with minimal maintenance.
Measure elapsed time
- In Stopwatch Mode, press B to start timing.
- Press B to stop. Press B again to resume.
- When stopped, press A to clear the display to zero.
Record a split time
- Press B to start the stopwatch.
- Press A to show the split. Timing continues internally.
- Press A again to clear the split display and show the running time. Repeat to capture further splits.
- Press B to stop, then A to clear.
Time two finishers
- Press B to start.
- Press A as the first finisher crosses the line.
- Press B as the second finisher crosses.
- Press A to display the second finisher’s time; press A again to clear.
How to set and run the countdown timer
The 3229/3421/3489 timer can be set from one second to 24 hours. When the countdown reaches zero, its alarm sounds for 10 seconds or until you press a button.
Set the starting time
- In Countdown Timer Mode, press A. The hours digit flashes.
- Press C to move between hours, minutes, and seconds.
- Press B to increase the flashing value. Hold B to change it faster.
- Press A to return to Timer Mode. To set a 24-hour starting time, the guide specifies entering
0:00' 00.
Start, stop, and reset
- Press B to start the countdown.
- Press B to stop, and press B again to continue.
- To reset manually, stop the timer and press A. With auto-repeat off, the timer stops at zero and returns to its starting value after the end alarm.
Turn auto-repeat on or off
With auto-repeat enabled, the timer sounds at zero and immediately starts another countdown from the set time. To change the setting on modules 3229/3421/3489, press A in Timer Mode, press D to switch auto-repeat, then press A to return. Press B to stop a repeating countdown; press A to reset it manually. Leave auto-repeat off if you want a single countdown that stops at zero.
Rank #2
- Rugged & Sporty Design – Matte black finish with bold digital display, built for tactical, military, and extreme sports enthusiasts.
- High-Brightness LED Backlight – Features Super Illuminator LED with a light guide plate, ensuring exceptional visibility in low-light conditions.
- 200M Water Resistance – Engineered for swimming, snorkeling, and outdoor adventures, this shock-resistant watch is ready for action.
- Extended 7-Year Battery Life – Powered by a CR2025 battery, offering years of reliable performance without frequent replacements.
- Shock-Resistant Structure – Built to withstand extreme conditions, making it ideal for sports, military, and rugged outdoor use.
How to set an alarm and hourly signal
The guide supports alarm settings for hour, minute, month, and day. The alarm sounds for 20 seconds at its set time; the hourly time signal beeps on the hour.
Choose when the alarm repeats
| Recurrence | Set these fields | Leave blank |
|---|---|---|
| Daily | Hour and minute | Month and day |
| On a specific date | Month, day, hour, and minute | None |
| Once per day during one month | Month, hour, and minute | Day |
| Monthly | Day, hour, and minute | Month |
Set the alarm time and enable the signal
- In Alarm Mode, press A until the hour flashes. The alarm switches on automatically when you begin setting it.
- Press C to select hour, minute, month, or day, then press B to increase the selected value. In 12-hour format, check that AM or PM is correct.
- Press A to return to Alarm Mode.
- In Alarm Mode, press B to cycle through both off, alarm only, hourly signal only, and both on. Press any button to stop a sounding alarm.
Which Casio guide should you use?
Casio’s feature page for the DW-5600SK-1 confirms that this variant has stopwatch elapsed, split, and place measurement; a 24-hour auto-repeat timer; a multi-function alarm; and an hourly signal. That confirms the feature family for that specific variant, not that every DW-5600 shares the same module or controls. Match the engraved module number to the appropriate guide before following button sequences.
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