This section provides an overview of the watch and introduces convenient ways it can be used.

Watch Features

Phone Linking

The watch supports connection and communication with a Bluetooth capable phone.

World Time

Display the current time in any one of 38 time zones* around the globe.

Alarm

An alarm sounds whenever a time specified by you is reached.

Stopwatch

The stopwatch measures elapsed time in units of 1/100 second for the first hour, and in one-second units thereafter, for up to 24 hours.

Timer

Countdown from a start time specified by you. An alarm sounds when the countdown reaches zero.

General Guide

1. Hour hand

2. Minute hand

3. Function hand

Indicates the current charge level.
Shows the remaining time when there are 30 minutes or less remaining before an alarm time or the end of a timer countdown.

4. LCD

A button

Pressing this button in the Timekeeping Mode cycles between displays.

B button

Press to turn on illumination.

C button

Each press cycles between watch modes.
In any mode, hold down this button for at least one second to return to the Timekeeping Mode.

D button

Pressing this button while any setting screen is displayed changes the setting.

Watch Face and Display Indicators

1. Countdown indicator
   Shows the remaining time when there are 30 minutes or less remaining before an alarm time or the end of a timer countdown.

2. The function hand points to while the watch is connected with a phone.

3. Battery level
   The function hand indicates the current charge level.

4. Displayed while a Stopwatch Mode lap measurement operation is in progress.

5. Displayed while a Stopwatch Mode split time measurement operation is in progress.

6. Displayed while the hourly time signal is enabled.

7. Displayed while an alarm is turned on.

8. Displayed during p.m. times while 12-hour timekeeping is being used.

9. Displayed while the watch is indicating summer time.

10. Flashes while the watch’s hands are shifted for easier reading.

11. Displayed when the watch successfully connects with a phone and adjusts its time setting.

Navigating Between Modes

Each press of (C) cycles between watch modes.

In any mode, hold down (C) for at least one second to return to the Timekeeping Mode.

Connecting with a Phone

Hold down (C) for at least three seconds to connect with a phone.

To disconnect, press any button.

Cycling Between Timekeeping Mode Digital Display Contents

Each press of (A) in the Timekeeping Mode toggles between the display information as shown below.

Shifting Hands to Read the Digital Display

Hand shift moves the hands out of the way for easy viewing of display information.

1. While holding down (B), press (C).

This shifts the analog hands to allow easy viewing of display information.



2. To return the hands to their normal timekeeping positions, hold down (B) as you press (C) again, or press (C) to change to another mode.

Charging

This watch runs on power supplied from a rechargeable (secondary) battery that is charged by a solar panel. The solar panel is integrated into the face of the watch, and power is generated whenever the face is exposed to light.

Charging the Watch

When you are not wearing the watch, put it in a location where it is exposed to bright light.

While you are wearing the watch, make sure that its face (solar panel) is not blocked from light by the sleeve of your clothing. Power generation efficiency is reduced even when the face of the watch is blocked only partially.

Important!

Some light sources and environments can cause the watch to become extremely hot during charging, which creates the risk of burn injury and damage to internal watch components.
Avoid charging the watch under conditions like the ones described below, where the temperatures may exceed 60 °C (140 °F).

On the dashboard of a vehicle parked in the sun

Near incandescent lamps, camera lights, halogen lamps, or other sources of heat

In locations exposed to direct sunlight for long periods and other hot locations

Checking the Charge Level

In the Timekeeping Mode, the function hand indicates the current charge level.

1. Good (high charge)

2. Good (medium charge)

3. Low Battery

Low Battery

A low battery will cause [LOW] to flash and will disable the functions below.

Illumination

Sounds (alarm, etc.)

Connection with a phone

If the charge level drops even further, [CHG] will flash and the hour and minute hands will stop at 12 o’clock. If this happens, all functions are disabled.

Dead Battery

The digital display goes blank if the battery goes dead. Memory data is lost, and watch settings are returned to their initial factory defaults.

Important!

Should the battery go low or go dead, expose the face (solar panel) to light as soon as possible.

Exposing the watch to light while its battery is dead causes [CHG] to start flashing. Expose the watch to light to charge it until the Timekeeping Mode screen re-appears.

Note

If [R] is flashing, it means that all functions, except for timekeeping, are disabled due to high momentary battery power consumption.

Hands are stopped and buttons do not work.

Charging Time Guidelines

The table below shows guidelines for approximate charging times.

Charging Times Required for 1 Day of Operation

Light Level (Lux)	Approximate Charging Time
50,000	8 minutes
10,000	30 minutes
5,000	48 minutes
500	8 hours

Charge Recovery Times

Sunny day, outdoors (50,000 lux)

Dead battery Medium charge	3 hours
Medium charge High charge	23 hours
High charge Full charge	7 hours

Sunny day, near a window (10,000 lux)

Dead battery Medium charge	7 hours
Medium charge High charge	88 hours
High charge Full charge	24 hours

Overcast day, near a window (5,000 lux)

Dead battery Medium charge	11 hours
Medium charge High charge	142 hours
High charge Full charge	38 hours

Indoor fluorescent lighting (500 lux)

Dead battery Medium charge	140 hours
Medium charge High charge	-
High charge Full charge	-

Note

Actual charging time depends on the charging environment, watch settings, and other factors.

Power Saving Function

Leaving the watch in a dark location for about one hour between the hours of 10 p.m. and 6 a.m. will cause the display to go blank, and the watch to enter Level 1 power saving. If the watch is left in this condition for six or seven days, the watch will enter Level 2 power saving.

Power Saving Level 1:

Digital display goes blank to save power. The watch can connect with a phone at this level.

Power Saving Level 2:

All hands stop and the digital display goes blank to save power. All functions are disabled.

Recovering from Power Saving Operation

Use one of the operations below to exit power saving.

Press any button.

Move the watch to a bright location.

Note

You can enable or disable Power Saving.

Configuring Power Saving Function Settings

Note that the watch also may enter power saving if its face is blocked from light by your sleeve while you are wearing it.

Viewing the Face in the Dark

The watch has an LED light that you can turn on for reading in the dark.

Turning On Illumination

Press (B) to illuminate the face and digital display.

Illumination turns off automatically if an alarm starts to sound.

Illumination is disabled while the hands are moving at high speed.

The light may flicker when it turns on or off.

Specifying the Illumination Duration

You can select either 1.5 seconds or three seconds as the illumination duration.

1. Enter the Timekeeping Mode.

Navigating Between Modes

2. Hold down (A) for at least two seconds until the name of the currently selected Home City is displayed.

This is the setting mode. The hands automatically shift out of the way for easy viewing of the display and other indicators.



3. Press (C) 12 times to display [LIGHT].



4. Press (D) to select an illumination duration.

[LT1]: 1.5-second light

[LT3]: 3-second light



5. Press (A) to exit the setting screen.

Useful Features

Pairing the watch with your phone makes a number of the watch’s features easier to use.

Auto time correction

Selection of More Than 300 World Time cities

Stopwatch Data Transfer to the Phone

In addition, a number of other watch settings can be configured using your phone.

To transfer data to a watch and to configure settings, you first need to pair the watch with your phone.

Your phone needs to have the “CASIO WATCHES” phone app installed to pair with the watch.