© 2018 CASIO COMPUTER CO., LTD.
Quick Reference Manual 3459
Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is designed,
carefully read and follow the instructions in this manual, especially the information under
"Operating Precautions" and "User Maintenance".
Be sure to keep all user documentation handy for future reference.
is a registered trademark or trademark of Bluetooth SIG, Inc. of the United
Your watch has a Mobile Link function that allows it to communicate with a Bluetooth
mobile phone and adjust its time settings to match those of the mobile phone.
This product complies with or has received approval under radio laws in various
countries and geographic areas. Use of this product in an area where it does not
conform to or where it has not been approved under applicable radio laws may be
punishable under local laws. For details, visit http://world.casio.com/ce/BLE/.
Use of this product inside of an aircraft is restricted by the aviation laws of each
country. Be sure to obey instructions provided by flight personnel concerning use of
devices such as this product.
Visit the website below for the operation
manual (Operation Guide) of this watch.
Using the Watch
Remove the watch from your wrist and place it in a brightly lit area.
The watch may become hot when exposed to light for charging. Take care to avoid
Avoid charging in locations where it is very hot.
Leaving the watch in a dark location between the hours of 10 p.m. and 6 a.m. for about
one hour will cause [PS] to start flashing on the display.
After about one week in the dark, the [PS] indicator will stop flashing, and all functions,
except for timekeeping and stopwatch functions, will become disabled.
[LOW] or [CHG] flash on the display.
All display indicators blank.
* Hold down C for about three seconds to establish a Bluetooth connection with a
Selecting a Mode
Each press of C cycles between modes as shown below.
Hold down C for about one second to enter the Timekeeping Mode.
1. Power Saving enabled.
2. Auto Light enabled.
3. Time reception successful.
4. Watch connected with a phone.*
5. p.m. indicator (No indication for a.m.)
6. Displayed time is summer time.
7. Alarm enabled.
8. Hourly time signal enabled.
9. Low battery charge.
10. Snooze alarm enabled.
11. Operation tone disabled.
Setting the Time
1. In the Timekeeping Mode, hold down
A until [HT] flashes.
This indicates that the Home City
setting can be changed.
2. Use D and B to change the Home
For information about available Home
City settings, visit the CASIO website.
Accuracy at normal
Specifications are subject to change without notice.
3. Press C twice. Moves flashing to
4. Press D to reset seconds to 00.
30 to 59 seconds: Adds 1 to minutes.
5. Press C. Moves flashing to hour.
6. Use D and B to change the setting.
7. Press C. Moves flashing to minute.
8. Use D and B to change the setting.
9. Press C. Moves flashing to year.
10. Use D and B to change the setting.
11. Press C. Moves flashing to month.
12. Use D and B to change the setting.
13. Press C. Moves flashing to day.
14. Use D and B to change the setting.
15. After all the settings are the way you
want, press A to exit the setting
15 seconds a month
Hour, minute, second, year, month, day, day of the week, a.m./p.m.
(P)/24-hour timekeeping, Full Auto Calendar (2000 to 2099),
Year display on setting screen only.
Auto receive, manual receive
Auto transmitter selection (for JJY, MSF/DCF77)
Receivable call signs: JJY (40 kHz/60 kHz), BPC (68.5 kHz),
WWVB (60 kHz), MSF (60 kHz),
DCF77 (77.5 kHz)
Manual and auto standard time/summer time switching
39 cities (39 time zones), UTC (Universal Time Coordinated);
Home City/World Time City switching
Other: Daylight Saving Time/Standard Time
Measurement unit: 1/100 seconds (first hour);
1 second (after first hour)
Measurement range: 23 hours, 59 minutes, 59 seconds
Measurement functions: Elapsed time, split time, two finishes
5 Daily alarms (with one snooze alarm); Hourly time signal
Countdown unit: 1 second
Countdown range: 24 hours
Setting unit: 1 second
Time up: 10-second beeper
Auto Time Correction
Time setting adjusted automatically at preset time.
One-touch Time Correction
Manual connection and time adjustment
Watch operation sounds the alert sound of the mobile phone.
Current time for approximately 300 cities selected for the watch
Home Time/World Time swapping
Original city function (location and name settings)
Auto summer time switching
Automatic switching between standard time and summer time
Reminds you of anniversaries and other important dates.
Data Communication Specifications
Frequency Band: 2400MHz-2480MHz
Maximum Transmission: 0 dBm (1 mW)
Communication range: 2 meters max. (depends on environment)
LED light; Selectable illumination duration (approximately 2 seconds
or 4 seconds); Auto Light Switch
Power Saving; Button operation tone on/off; Month/day order;
Day of the week language; Auto time correction ON/OFF
Solar panel and 1 rechargeable battery
Auto time correction: 4 times/day
Alarm: Once (10 seconds)/day
Illumination: Once (2 seconds)/day
Power Saving: 6 hours/day