Cal. No. W770 Riiiver
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Pairing (registering) of a smartphone
Registering a smartphone
- For registration, you have to operate both the watch and the smartphone.
- Be sure that the watch and the smartphone are charged enough.
Especially, check the power reserve of the watch and charge it before registration if the power reserve level is “1” or “0”. - It may take 20 - 30 seconds to finish registration.
About 30 seconds after, the watch returns to normal movement even when registration failed.
- Download the dedicated app “CITIZEN Eco-Drive W770” at an app site and install it.
- Start the dedicated app.
- Tap “Pair a watch”.
- Tap “Pair a watch”.
- Pull the crown out to position 1.
- Rotate the crown to change the mode to [TME] or [L-TM].
- Push the crown in to position 0.
- Press and release the upper right button B.
Operation on the smartphone
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Keep the screen of the app shown.
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When the message is not indicated, tap 
on the bottom of the screen and tap “Pair a watch“.
Operation of the watch
The second hand points to 30 seconds and stops.
The second hand points “ACT” (40-second position) and registration starts.
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Agree when a dialog appears to request your permission to use Bluetooth connection.
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On some models of smartphones, you must allow using of your location information.
When registration was successfully finished
“Connected” is displayed on the screen of the app.
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The watch and the smartphone are connected as registration is finished.
The function hand of the watch points “ON” of connection status and the second hand returns to normal movement. 
When notice of firmware update is appeared.
The following notice may be displayed after pairing.
You must execute this firmware update to connect the watch and your smartphone through the dedicated app “CITIZEN Eco-Drive W770”.
- Once you execute this update, you cannot roll the firmware back to the old one.
- Watches with the updated firmware cannot be connected with smartphones through the dedicated app “CITIZEN Bluetooth Watch”.
When executing this firmware update, check ang agree with all the terms, apply check marks on all items and tap “Agree to all the terms and update”.
- After finishing firmware update, execute pairing again