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.

Solar Charging

Sunlight and artificial light generate electricity for watch operation as it charges.

Alarm

A beeper sounds when the alarm time you set is reached.

Stopwatch

Measures up to 30 minutes of elapsed time in one-second increments.

Timer

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

General Guide

1. Function hand

2. Hour hand

3. Minute hand

4. Crown

5. Second hand

6. 24-hour hand

7. Day indicator

A button

In the Timekeeping Mode or Alarm Mode, press to illuminate the face.

B 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.

C button

Press when paired with a phone to sync the watch’s time setting with the phone’s setting.

Watch Face Items

1. Measurement

In the Stopwatch Mode and Timer Mode, the function hand indicates the measurement value.

2. Day of week

In the Timekeeping Mode, the function hand indicates the current day of the week.

3. [R]

When the watch is standing by for connection with a phone, the second hand points to [R].

4. [C]

The second hand will point to [C] if the watch is connected with a phone.

5. Alarm on/off setting

In the Alarm Mode, the second hand indicates if the alarm is enabled or disabled.

[ON]: Alarm enabled

[OFF]: Alarm disabled

6. [ST]

The function hand momentarily points to [ST] when you enter the Stopwatch Mode.

7. [TR]

The function hand momentarily points to [TR] when you enter the Timer Mode.

8. [AL]

In the Alarm Mode, the function hand points to [AL].

Navigating Between Modes

Each press of (B) cycles between watch modes.

Hold down (B) for at least one second to enter the Timekeeping Mode.

After you enter the Stopwatch Mode or Timer Mode, the function hand first points to the mode name and then indicates the measurement value.

Connecting with a Paired Phone

Hold down (B) for at least 2.5 seconds to connect with a phone.

To disconnect, press any button.

Mode Overview

Timekeeping Mode

The main hour, minute, and second hands indicate the current time.

1. Day of the week at current location

2. Current location time (24-hour time)

One revolution every 24 hours.

Connecting with a Paired Phone to Correct the Watch’s Time

Press (C).

Stopwatch Mode

The main hour and minute hands indicate the current time.

The function hand and second hand indicate the stopwatch measurement value.

1. Stopwatch minutes

2. Stopwatch seconds

Timer Mode

The main hour and minute hands indicate the current time.

The function hand and second hand indicate the Timer measurement value.

1. Timer minutes

2. Timer seconds

Alarm Mode

The hour hand and minute hand indicate the alarm time setting.

1. Alarm time

2. Alarm hour (24-hour time)

One revolution every 24 hours.

3. Alarm enabled/disabled

Using the Crown

The watch’s crown is a screw-in (screw lock) type. To use the crown, you first need to rotate it towards you (leftwards) to loosen it.

Important!

To prevent loss of water resistance and/or damage due to impact, be sure to screw the crown in by rotating it away from you as you push it in.

When pushing the crown back in, take care not to apply too much force.

Fast Forward/Fast Reverse

After pulling out the crown, rotating it quickly in succession in either direction will start a fast forward or fast reverse operation. While a fast forward operation is in progress, quickly rotating the crown in succession again will increase the speed even further.

Stopping Fast Forward/Fast Reverse

Rotate the crown in the direction opposite that of the ongoing operation or press any button.

Hand and Day Indicator Movement

Function Hand and Day Indicator Movement

Changing the day setting of the watch will also cause the function hand to move.

Day

It can take anywhere from about one to four minutes for the day indicator to change after timekeeping reaches midnight. At this time, the function hand moves as the day indicator changes.

The day indicator does not change while measurement is in progress or paused in the Stopwatch Mode or Timer 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

Remaining Charge and Dead Battery

You can determine if the charge level is low by checking the hand movement. Functions become disabled as battery power goes low.

Important!

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

Note

Exposing the watch face to light after the battery goes dead will cause the second hand to revolve counterclockwise until it stops at second 57. This indicates charging has started.

Low Battery Power

The second hand jumps at two-second intervals.

Dead Battery

All hands and the day indicator are stopped.

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	2 hours
Medium charge High charge	18 hours
High charge Full charge	5 hours

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

Dead battery Medium charge	6 hours
Medium charge High charge	67 hours
High charge Full charge	18 hours

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

Dead battery Medium charge	8 hours
Medium charge High charge	108 hours
High charge Full charge	29 hours

Indoor fluorescent lighting (500 lux)

Dead battery Medium charge	94 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

Leaving the watch in a dark location for about one hour between the hours of 10 p.m. and 5:50 a.m. will cause the second hand to stop, and the watch to enter Level 1 power saving. If the watch is left in this condition for six or seven days, all hands will stop at 12 o’clock and the watch will enter Level 2 power saving.

Level 1:

Second hand stops to save power.

Level 2:

The following operations are stopped to save power: all hand movement (excluding the day indicator), Bluetooth connection, and alarm alerts.

Note

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

Recovering from Power Saving Operation

Use one of the operations below to exit power saving.

Press any button.

Pull out the crown.

Move the watch to a bright location.

Viewing the Face in the Dark

The watch has an LED light that you can turn on to illuminate the face. When turned on, illumination becomes gradually brighter and then gradually dimmer.

You can turn on the light in the Timekeeping Mode or Alarm Mode.

Turning On Illumination

Press (A) to illuminate the face of the watch.

Illumination turns off automatically if an alarm starts to sound.

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

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

Useful Features

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

Auto time correction

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.