Supported Phones
For information about phones that can
connect with the watch, visit the CASIO
website.
https://world.casio.com/os_mobile/wat/
Specifications
Accuracy at normal temperature :
±15 seconds per month average when time
adjustment by time calibration signal
reception or by communication with a phone
is not possible.
Timekeeping :
Hour, minute, second, day (2000 to 2099
full auto calendar), day of the week
Signal Receive Functions :
Auto receive, manual receive
Auto transmitter selection (for JJY, MSF/
DCF77)
Receivable Call Signs
JJY (40kHz/60kHz), BPC (68.5kHz),
WWVB (60kHz), MSF (60kHz), DCF77
(77.5kHz)
Standard Time
Summer time auto/manual switching
World Time :
Current time in 38 time zones (including 27
world cities)*
and Coordinated Universal
Time (UTC) time display, summer time auto
switching
*
Subject to updates by connection between
the watch and a phone.
Mobile Link :
Auto Time Correction
Time setting adjusted automatically at
preset time.
One-touch Time Correction
Manual connection and time adjustment
Phone finder
Watch operation sounds the alert sound
of the phone.
Home Time swapping
Auto summer time setting
Automatic switching between standard
time and summer time.
Hand alignment correction
Data Communication Specifications
Bluetooth
®
Frequency Band: 2400MHz to 2480MHz
Maximum Transmission: 0 dBm (1 mW)
Communication range: Up to 2 meters
(depends on environment)
Stopwatch :
Measuring unit: 1 second
Measuring capacity: 23:59’59” (24 hours)
Measuring functions: Elapsed time
Other :
Auto hand position correction, Power
Saving, battery indicator, battery charge
alert
Power Supply :
Solar panel and one rechargeable battery
Approximate Battery Life :
Approximately 5 months
Conditions
Not exposed to light under the conditions
below.
Auto Time Adjustment: 4 times/day
Power Saving: 6 hours/day
Specifications are subject to change without
notice.
Copyrights and Registered
Copyrights
●
The Bluetooth
®
word mark and logos are
registered trademarks owned by the
Bluetooth SIG, Inc. and any use of such
marks by CASIO Computer Co., Ltd. is
under license.
●
iPhone and App Store are trademarks of
Apple Inc. in the United States and other
countries.
●
iOS is a trademark or registered trademark
of Cisco Systems, Inc.
●
GALAXY is a registered trademark of
Samsung Electronics Co., Ltd.
●
Android and Google Play
TM
are trademarks
or registered trademarks of Google LLC.
●
Other company names and product names
used herein are trademarks or registered
trademarks of their respective companies.
Troubleshooting
Signal Reception (Time
Calibration Signal)
Q1
The watch cannot perform a receive
operation.
Is the watch’s battery charged?
Signal reception is not possible while
battery power is low. Keep the watch
exposed to light until it recharges
sufficiently.
l
Is the watch in the World Time Mode or in
the Stopwatch Mode with the stopwatch
reset to all zeros?
The watch cannot receive time signals
while auto adjustment is disabled or while
there is an elapsed time measurement
operation being performed in the
Stopwatch Mode. Return to the World
Time Mode or enter the Stopwatch Mode
and reset the stopwatch to all zeros.
l
l
Is your Home City setting correct for your
location?
The watch will not indicate the correct time
if the Home City setting is wrong. Change
your Home City setting so it correctly
reflects your location.
l
After checking the above, the watch still
cannot perform a receive operation.
Time calibration signal reception is not
possible under the conditions described
below.
●
When watch is at Level 2 power saving
●
When the crown is pulled out
●
While the watch is paired with a phone
For information about unpairing, see
“
If successful reception is not possible for
some reason, you can adjust the time and
day settings manually.
Watch Operation Guide 5665
25