CITIZEN CONNECTED Eco-Drive W770 Riiiver Instruction Manual

Introduction

Thank you for purchasing this Citizen watch. Please read this instruction manual carefully for correct use. The caliber number for this watch is "W770". You can access the web instruction manual via the QR code or the link: https://www.citizenwatch-global.com/support/html/en/w770r/w770r.html. Some models may feature enhanced functions like slide rules and tachymeters; refer to the web support page for details not covered here: https://www.citizenwatch-global.com/support/.

Safety Precautions -- IMPORTANT

These instructions must be strictly followed to ensure optimal use and prevent injury to yourself, others, or property. Read the entire booklet (especially pages 15 and 16) to understand the following symbols:

• DANGER: Highly likely to cause death or serious injury.
• WARNING: Can cause serious injury or death.
• CAUTION: Can or will cause minor or moderate injury or damage.

Important instructions are also categorized:

• ❗ (Warning/Caution symbol) followed by prohibited matters.
• ❗ (Warning/Caution symbol) followed by instructions to follow or precautions to observe.

Features

Connection with a smartphone through the dedicated app

Indicates notifications such as incoming calls. Offers functions to prevent leaving your smartphone behind or to search for a missed phone. Download the dedicated app from your smartphone's app store. Refer to the web manual for details.

Personalization function

Customize up to sixty-two extended functions via the dedicated app. This feature is called "iiidea". More information is available at: https://riiiver.com/.

Eco-Drive

No periodical battery replacement is required. This watch is powered by light. "Eco-Drive" is an original technology of Citizen.

Alarm

Sounds at a set time. Can also be set through the dedicated app.

Chronograph

Measures up to 60 minutes with 1-second increments.

Local time

Easily view the time for a second time zone anywhere in the world. Can also be set through the dedicated app.

Perpetual calendar

No monthly or leap-year date correction needed until February 28, 2100.

Before using this watch

This watch has a rechargeable cell charged by light. Expose the dial to direct sunlight regularly. For charging details, see page 13. After unboxing, check the power reserve (page 2) before connecting to your smartphone.

Operation through the dedicated app

Some watch functions can be set via the dedicated app. See page 3 for details.

Band adjustment

It is recommended to seek assistance from an experienced watch technician for band sizing. Incorrect adjustment may lead to detachment or injury. Consult an authorized service center.

Protective stickers

Remove all protective stickers (case back, band, clasp, etc.) before use. Otherwise, moisture may enter gaps, potentially causing skin rash or corrosion.

How to use a specially designed crown/button

Some models have specially designed crowns/buttons to prevent accidental operation.

Screw down crown/button

Unlock the crown/button before operating.

• Unlock: Rotate the crown counterclockwise until it releases. Rotate the locking screw counterclockwise until it stops.
• Lock: Push the crown into the case. With gentle pressure, rotate clockwise to secure. Tighten firmly. Rotate the locking screw clockwise and tighten firmly.

Recessed button

Press the button with a non-marring narrow-tipped object. Metal objects may cause scratches.

Component identification

Illustrations may differ from your actual watch. A solar cell is located under the dial. The "CHECK" indicator may not be printed on all models.

Hands and buttons

Description of watch face elements:

• Hour hand, Minute hand, Second hand: Indicate time.
• 24-hour hand: Indicates 24-hour time.
• Mode hand: Indicates the current mode (TME, L-TM, CHR, ALM).
• Function hand: Displays power reserve, connection status, etc. Pressing button A changes its indication in [TME] or [L-TM] mode with crown at position 0.
• Crown: Used for setting time, modes, etc. Has multiple positions (0, 1, 2).
• Button A: Used for resetting chronograph, checking power reserve, and other functions depending on mode.
• Button B: Used for starting/stopping chronograph, and other functions depending on mode.

Changing the mode

This watch features four modes:

• TME: Shows ordinary time.
• L-TM: Shows time and calendar, differing from [TME] mode.
• CHR: Chronograph mode.
• ALM: Alarm setting mode.

Procedure:

1. Pull the crown out to position 1. The second hand stops at 30 seconds.
2. Rotate the crown to change the mode. Ensure the mode hand points securely to the desired mode marker.
3. Push the crown in to position 0 to finish. The watch indication will change to the selected mode.

Checking the power reserve

For charging details, see "Charging your watch" (page 13). For power reserve indication details, see page 3.

1. Change the mode to [TME] or [L-TM] (page 2) and push the crown in to position 0.
2. Press the lower right button A repeatedly. The function hand will indicate the power reserve level.

Power reserve indication levels:

Caution: When power reserve is "0", smartphone registration/connection is not possible. Basic functions remain available, but the second hand may move every two seconds (insufficient charge warning).

Before connecting with a smartphone

This watch uses Bluetooth Low Energy for communication. Install the "CITIZEN Eco-Drive W770" app on your smartphone to pair the watch. The connection flow is: Install App -> Start App -> Pairing.

Trademarks: Bluetooth® is a registered trademark of Bluetooth SIG, Inc. Android is a registered trademark of Google Inc. iOS is a trademark of Apple Inc.

Connection: The dedicated app must be running on the smartphone. For some smartphones, background app operation may need to be enabled.

Compatible smartphones: Check the web manual for compatible Android OS (9.0+) and iOS (13.3+) versions.

For users of the older app "CITIZEN Bluetooth Watch": Update firmware and uninstall the old app to use "CITIZEN Eco-Drive W770".

Links:

• Instruction manual: https://www.citizenwatch-global.com/support/html/en/w770r/w770r.html
• Difference between Cal. W770 and Cal. W770 Riiiver: https://www.citizenwatch-global.com/support/html/en/w770r/intro_w770r.html

Functions available when connected with a smartphone

Functions available through the dedicated app

Functions available with the watch

About time reception: The watch automatically receives time information from your smartphone. This occurs daily after 3:00 AM in [TME] mode. Signal reception is only active in [TME] and [L-TM] modes.

Notice: In areas with electronic device restrictions (e.g., airplanes), disconnect your smartphone and set the watch to [CHR] mode.

Notification indication on the watch

The second hand indicates notification types:

• CALL (55 sec): Incoming call notification.
• INFO (50 sec): Various info notification.
• LL (45 sec): Disconnection notification (Link Loss).
• ACT (40 sec): Receiving time info or executing an iiidea.
• CHECK (35 sec): Indication of an iiidea error.

Notification indication occurs in [TME] or [L-TM] mode with the crown at position 0. Notifications received in other statuses are postponed. New notifications cancel old ones.

Notification sound and vibration

Can be added via iiidea settings. Works even when the second hand cannot indicate.

Notification reception area

Connectable distance is up to 10 meters (33 feet). Range may be reduced by obstacles. Avoid blocking the watch with your body.

Canceling the notification indication

Press and hold the lower right button A or upper right button B for 1 second while notification is displayed. The second hand returns to normal movement. Changing the crown position also cancels it. Manually canceled notifications cannot be shown again.

Testing the vibration of notification

Requires sufficient power reserve (not "0"). Settings are made via iiidea. Change mode to [ALM], push crown to 0, press and release upper right button B to test vibration (repeats 5 times). Return to [TME] mode to finish.

Pairing (registering) the smartphone

Execute registration when connecting the watch and smartphone for the first time. Unique registration information is saved. Up to three registrations can be saved on the watch. You can switch between registered smartphones (page 5). New registration information cannot be saved if a destination is full without deleting existing data.

Choosing the destination to save registration information

1. Change mode to [TME] (page 2) and pull crown to position 2. The second hand points the current saving destination.
2. Rotate the crown to choose the desired destination (1, 2, or 3).
3. Push the crown in to position 0 to finish.

Registering the smartphone

Requires operation on both watch and smartphone. Ensure sufficient charge. It may take 20-30 seconds.

1. On the smartphone: Download and install the "CITIZEN Eco-Drive W770" app. Start the app and keep it on screen. Tap [Pair a watch].
2. On the watch: Change mode to [TME] or [L-TM] (page 2), push crown to position 0. Press and release upper right button B. The second hand points "ACT" (40-sec position) and registration begins. Agree to Bluetooth connection requests and location permissions if prompted.

After successful registration, "Connected" will display on the app. The function hand on the watch will show "ON" for connection status.

Firmware Update

A firmware update may be prompted after pairing. This update is required for Riiiver compatibility. It cannot be rolled back. The updated watch will not connect with the older "CITIZEN Bluetooth Watch" app. Agree to terms and update. Re-pair after update.

Connecting/disconnecting the smartphone

Checking connection status

1. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0.
2. Press lower right button A repeatedly until the function hand indicates connection status (ON/OFF).

Disconnecting

1. Cancel notification indication first (page 4).
2. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0 while connected.
3. Press and hold upper right button B for 4 seconds. The second hand points "ACT", and the function hand shows "OFF".

Connecting

To reconnect to a disconnected smartphone (must be registered):

1. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0 while disconnected.
2. Start the dedicated app.
3. Press and release upper right button B. The second hand points "ACT", and the function hand shows "ON".

Choosing a smartphone and connecting to it

Select from up to three saved registration profiles.

1. Change mode to [TME] (page 2) and pull crown to position 2.
2. Rotate the crown to select the desired registration information (1, 2, or 3).
3. Push the crown in to position 0 (keeping [TME] mode). Connection to other smartphones is disconnected.
4. Press and release upper right button B. The second hand points "ACT", and the function hand shows "ON".

Screens of the dedicated app

Home screen

Appears after starting the app. Displays a graphic pattern representing the watch's power generation amount. Some screens may not open if the watch is not connected.

Riiiver screen

Used for creating a Riiiver account and logging in. Requires an email address for account creation.

Personalization function screen, iiidea setting screen, and description screen of the iiidea

Accessed after logging into Riiiver. Allows setting and managing "iiideas" (customizable functions). Tapping an iiidea name opens its description screen.

Local Time screen

Adjusts local time settings for the watch.

Alarm screen

Adjusts alarm settings for the watch.

Light Level screen

Displays power generation history in line graphs (Day, Week, Month).

Using iiidea

To use an iiidea, it must be set in the "CITIZEN Eco-Drive W770" app on its Riiiver screen. You can download more iiideas from the iiidea Store. The watch and smartphone must be connected, and the app running. An account is required for Riiiver and the iiidea Store.

Making a Riiiver account and logging in

1. Start the "CITIZEN Eco-Drive W770" app.
2. Tap the Riiiver icon on the home screen.
3. Tap "Create Account" on the Riiiver LOG IN screen.
4. Follow on-screen instructions to create an account. You will be logged in automatically.

Setting an iiidea

1. Open the personalization function screen in the app.
2. Select the type of iiidea you want to set (e.g., Notifications, Push buttons simultaneously, Operate crown, Other iiideas).
3. Tap the switch next to the desired iiidea to activate it.

Up to 30 iiideas can be activated for "Notifications" and "Other iiideas" each, and 1 for specific actions. Some iiideas cannot be activated simultaneously.

Adding an iiidea

1. Tap "Adding iiideas" on the personalization function screen to open the iiidea Store.
2. Choose an iiidea and tap "Download".
3. Return to the iiidea setting screen and activate the downloaded iiidea.

Using the description screen of an iiidea

Open the personalization function screen, select the iiidea type, and tap the name of the iiidea to view its description, trigger, and setting details.

Executing an iiidea through the watch

Some iiideas can be executed via watch operations. The watch and smartphone must be connected, and the iiidea must be set in the app.

Executing an iiidea by operating the buttons of the watch

Cannot be used if "Find my smartphone" is active. Deactivate it first (page 7).

1. Confirm watch and smartphone are connected and the app is running.
2. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0.
3. Press and release both lower right button A and upper right button B simultaneously. The iiidea is executed.

Executing an iiidea by operating the crown

1. Confirm watch and smartphone are connected and the app is running.
2. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0.
3. Within 3 seconds, change the crown position as follows: 0 → 2 → 0. The iiidea is executed. (Alternative: 0 → 1 → 0).

Rotating the crown at position 2 or 1 while pushing/pulling it in/out cancels execution. Notification indication is also canceled.

Notification setting on the smartphone

To receive notifications from third-party apps on the watch, enable notifications on the smartphone and configure iiidea settings. Recommended smartphone settings include: "Allow Notifications", "Show in Notification Center", "Banners" or "Alerts" style, and "Not optimized" battery optimization.

Making the smartphone emit sound

Locate your connected smartphone by making it emit sound. This function works even if the phone is not actively connected, provided it's within range. Cannot be used if "Find my smartphone" is deactivated.

1. Change mode to [TME] or [L-TM] (page 2) and push crown to position 0.
2. Press and release both lower right button A and upper right button B simultaneously. The smartphone emits sound.
3. Stop the sound via the smartphone screen.

Removing pairing (registration) information

Remove registration information if you encounter connection issues, want to save a new smartphone, or after app updates. Ensure you also remove the watch from your smartphone's Bluetooth device list.

Removing the registration information on the watch

1. Change mode to [TME] (page 2) and pull crown to position 2.
2. Rotate the crown to select the registration information to remove.
3. Press and hold upper right button B for 7 seconds.
4. Push the crown in to position 0 to finish.

Removing registration information on the smartphone

Remove "W770 Riiiver" from the smartphone's registered Bluetooth devices list.

Setting functions of the watch on the dedicated app

Light Level screen

View power generation history in line graphs (Day, Week, Month) by adjusting the slider on the app's home screen.

Local Time screen

Adjust local time settings. Watch and smartphone must be connected.

1. Change watch mode to [L-TM] (page 2) and push crown to position 0.
2. Tap the home screen icon in the app.
3. Adjust local time by tapping on the map or searching for a location. Tap the send icon (blue) to apply settings.

Alarm screen

Adjust alarm settings. Watch and smartphone must be connected.

1. Change watch mode to [TME] (page 2) and push crown to position 0.
2. Tap the home screen icon in the app.
3. Adjust alarm time, days of the week, and ON/OFF status. Tap the send icon (blue) to apply settings.

Using local time [Local Time]

Display a time different from [TME] mode, adjustable within ±27 hours from UTC. Date and day of week adjust accordingly.

Indicating local time

1. Change mode to [L-TM] (page 2) and push crown to position 0. The current local time is displayed. Button A can show the day of the week.

Adjusting the local time

Can also be adjusted via the app.

1. Change mode to [L-TM] (page 2) and pull crown to position 2.
2. Rotate the crown to adjust local time (minute hand moves in 15-minute increments). Rapid rotation allows continuous movement. Stop by rotating the crown. Stops automatically after ±12 hours.
3. Push crown to position 0 to finish.

Using the chronograph

Measures up to 60 minutes in 1-second increments. Stops and resets automatically after 60 minutes. Function hand indication cannot be changed in [CHR] mode.

1. Change mode to [CHR] (page 2) and push crown to position 0. Second and function hands indicate 00:00.
2. Start measurement: Press Button B (start/stop).
3. Reset: Press Button A (reset). Pulling out the crown also stops and resets the chronograph.
4. Change mode to [TME] and push crown to position 0 to finish.

Using alarm [Alarm]

Alarm is based on [TME] mode time. Function hand indication cannot be changed in [ALM] mode. Can also be set via the app.

Checking alarm setting

1. Change mode to [ALM] (page 2) and push crown to position 0. Hour, minute, and 24-hour hands show alarm time; function hand shows alarm status (ON/OFF).
2. Pressing Button A cycles through ON/OFF.
3. Change mode to [TME] and push crown to position 0 to finish.

When the time set comes: Alarm sounds for 15 seconds. Does not sound if crown is not at position 0. Press any button to stop.

Changing alarm setting

Alarm time is set in 24-hour format.

1. Change mode to [ALM] (page 2) and pull crown to position 2.
2. Press and hold lower right button A for 2 seconds. Minute hand moves slightly, allowing adjustment.
3. Rotate the crown to set alarm time. Check AM/PM using the 24-hour hand. Rapid rotation allows continuous movement.
4. Press and release lower right button A to set alarm ON/OFF.
5. Change mode to [TME] and push crown to position 0 to finish.

Checking the alarm: Alarm sounds while pressing and holding upper right button B during step 1.

Charging your watch

The watch uses a solar cell under the dial to charge a built-in rechargeable cell. Expose the dial to light (sunlight or fluorescent lamps) for charging. For optimal performance:

• Place the watch in bright light, like near a window, even when not in use.
• Expose the dial to direct sunlight for 5-6 hours weekly.
• Avoid dark places for extended periods.

CAUTION: Do not charge at high temperatures (above 60°C / 140°F) to prevent malfunction. If sleeves frequently obscure the dial, supplemental charging may be needed. The watch has an overcharging prevention function.

When the watch reaches a low charge state (insufficient charge warning function)

The second hand moves every two seconds. Charge the watch immediately. When sufficiently charged, the second hand returns to normal movement. If not charged for 10+ days after warning, the watch will stop.

During insufficient charge warning: Time, date, and day of week are indicated correctly, but other modes/functions may be unavailable.

Charging time by environment

Approximate charging times for continuous light exposure:

Direct sunlight is recommended for charging; fluorescent lamps or interior lighting may not provide sufficient illumination.

After charged fully, the watch runs without additional charging

• Standard use with a smartphone: About 9 months (connection function available for about 100 days).
• Using with no smartphones: About 1.5 years.

Cautions when connected with a smartphone: Long connection times and frequent notifications consume power. Keep the watch sufficiently charged. Disconnect the smartphone when not needed. Ensure the smartphone is also charged.

Power save function

The second hand stops automatically in dark conditions to save power. The watch functions normally while power save is active. Power save does not operate if the crown is in position 1 or 2, the mode is [CHR] or [ALM], or the second hand indicates a notification.

Canceling the power save function

Power save ends when the watch is operated, exposed to light, or receives time info/notification.

Adjusting the time and calendar manually

Set time and calendar manually in [TME] mode. Local time is also corrected automatically.

1. Change mode to [TME] (page 2) and pull crown to position 2.
2. Press and hold lower right button A for 2 seconds. The second hand stops at 0 second, and the minute hand moves slightly.
3. Press and release lower right button A repeatedly to select what to correct: Hour/minute → date → year/month → day of week. Hands/indications move slightly when adjustable.
4. Rotate the crown to adjust the selected item. Hour, minute, and 24-hour hands move synchronously. Date advances every 5 crown rotations. Rapid rotation allows continuous movement.
5. Repeat steps 3 and 4.
6. Push crown to position 0 to finish, using a reliable time source.

Month and year indications

Set year and month using the second hand position, referring to the dial illustration and table for years since leap year.

Checking and correcting the reference position

If time or calendar is incorrect after time reception, check the reference position. If hands/indications are not aligned correctly, accuracy will be affected.

What is the reference position?

The base position for all hands and calendar to indicate functions correctly:

• Hour, minute, second hands: 0 hour 00 minute 0 second
• 24-hour hand: "24"
• Date indication: Midway between "31" and "1"
• Function hand: "30" (straight below)

Procedure to check and correct:

1. Change mode to [CHR] (page 2) and pull crown to position 2. The second hand moves to the stored reference positions.
2. Press and hold lower right button A for 2 seconds. Hands and indications move to reference positions. Release button as they start moving.
3. Check reference positions against the illustration.
4. If correct, push crown to position 0 and set mode to [TME].
5. If incorrect, proceed to step 4. Push crown to position 0.
6. Press and release lower right button A. Function hand moves slightly, making hands/date adjustable.
7. Press and release lower right button A repeatedly to select what to correct: Function hand/date → hour, minute, 24-hour hands → second hand. Function hand points "60" (straight above) when adjusting hour, minute, 24-hour hands.
8. Rotate the crown to adjust. Hands move synchronously. Date advances every 5 rotations.
9. Repeat steps 5 and 6.
10. Push crown to position 0.
11. Change mode to [TME] to finish.

Resetting the watch - All Reset

If the watch malfunctions, reset all settings. Charge the watch first if power reserve is insufficient.

After All Reset, perform these operations:

1. Correct the reference positions (refer to step 4 onwards on page 14).
2. Adjust time and calendar manually (page 13) or via smartphone connection.

All Reset Procedure:

1. Change mode to [CHR] (page 2) and pull crown to position 2.
2. Press and hold buttons A and B simultaneously for 4 seconds or more. Release them. The watch will emit an alarm sound and vibrate as hands move to their reference position.

Setting values after All Reset:

• Calendar: January 1 of leap year, Sunday
• Local time: ±0 from UTC
• Alarm setting: ALM OFF
• Alarm time: 0:00 AM
• Registration information of smartphones: Kept, with registration information 1 set as connection target.
• Connection status: OFF

Bluetooth 4.0 wireless technology

Use of Bluetooth technology may be restricted in some countries. Check the list at: https://www.citizenwatch-global.com/support/html/en/w770r/w770r.html. Unauthorized use may be punishable by law. Bluetooth communication may be monitored. Do not use for critical communications. Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG, Inc.

Eco-Drive watch handling precautions

CAUTION Always Make Sure to Recharge Frequently

Long sleeves can inhibit light transmission, potentially causing the watch to lose charge. Place the watch in bright locations when not in use. Expose to direct sunlight for 5-6 hours weekly. Avoid dark places.

CAUTION Recharging Precautions

Do not charge at high temperatures (above 60°C / 140°F) as it may cause malfunction. Keep a distance of at least 50 cm (19-11/16 inches) from heat-generating light sources like incandescent lamps. Avoid charging in extremely hot locations like a vehicle dashboard.

CAUTION Replacement of Rechargeable Cell

This watch uses a special rechargeable cell that does not require periodic replacement. However, wear and tear may increase power consumption over years. The cell should never be removed by the user. If removal is necessary, keep out of reach of children. Dispose of the cell according to local regulations.

WARNING Handling of Rechargeable Cell

Never use a battery other than the specified rechargeable cell. Using an incorrect battery could lead to overcharging, rupture, damage, or injury.

Water resistance

WARNING Water resistance

Refer to the watch dial/case back for water resistance indication (e.g., W.R. x bar). The chart below provides usage examples.

Notes:

• Non-water resistant models should not contact moisture.
• 3 atmospheres: For occasional accidental splashing.
• 5 atmospheres: May be worn while swimming, but not skin diving.
• 10/20 atmospheres: May be worn while skin diving, but not scuba or saturation diving.
• If watch is immersed in seawater, rinse with fresh water and dry. Do not pour tap water directly onto the watch. Take off before bathing. If seawater enters, place in a sealed bag and seek immediate repair.

Precautionary items and usage limitations

CAUTION To Avoid Injury

Be careful when holding small children, exercising, or working to avoid injury. Do not wear in saunas or hot environments. Be cautious when putting on/taking off the watch to avoid damaging fingernails. Remove watch before sleeping.

CAUTION Precautions

Always use the watch with the crown pushed in (normal position), and screw lock-type crowns secured. Do not operate buttons/crown when wet, as water may enter and cause damage. If watch fogs up, consult a dealer. Avoid strong magnetism, strong shocks, and static electricity. Do not use in environments with chemicals or corrosive gasses. Remove protective stickers to prevent skin irritation or corrosion.

CAUTION When Wearing Your Watch

Band

Leather and rubber bands deteriorate over time. Replace periodically. Leather bands may be affected by moisture, causing discoloration or rash. Avoid contact with volatile substances, bleach, or alcohol. Ultraviolet light can cause discoloration. Do not wear bands too tightly. Rubber bands may stain from clothing; replace if elasticity is lost or cracks appear. Seek professional adjustment/repair for band abnormalities.

Temperature

Watch may stop or function improperly outside the operating temperature range (-10°C to +60°C).

Magnetism

Strong magnetism can affect the timekeeping accuracy of analog quartz watches.

Strong Shock

Avoid dropping or subjecting the watch to strong impacts, which can cause malfunctions or damage.

Static Electricity

Integrated circuits are sensitive to static electricity; erratic operation may occur.

Chemicals, Corrosive Gasses and Mercury

Avoid contact with solvents, chemicals, and mercury, which can discolor or damage watch materials.

Protective Stickers

Remove all protective stickers before use to prevent skin irritation or corrosion.

Specifications

The following conditions are supposed in the table above as "Standard use with a smartphone":

Specifications and contents are subject to change without prior notice.