Module No. 3578

Published: 9/2025

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Basic Functions

Mode Navigation
Timekeeping Display Switching
Solar Charging
Low Battery Alert

CASIO WATCHES

Mobile Link
Installing the App
Pairing
Phone Connection
Disconnecting the Phone
Unpairing
World Time Settings
Phone Finder
Summer Time Setting (Home City)
Battery Level Indication
Recording Your Current Location（TIME&PLACE）
Watch Settings

Adjusting the Current Time Setting

Time Signal Reception
Auto Receive
Manual Receive
Manual Time Correction
Auto Time Correction
Auto Time Correction On/Off
One-touch Time Correction
Home City and Summer Time Settings
Configuring Current Time and Date Settings
12-/24-hour Time Switching

World Time

Checking World Time
World Time City and Summer Time Settings
Home Time/World Time Swapping

Alarm

Alarm Settings
Alarm On/Off
Hourly Time Signal On/Off

Stopwatch

Stopwatch Measurement
Split Time Measurement
1st, 2nd Place Finisher Measurement

Timer

Timer Settings
Timer Operation

Illumination

Turing on Illumination
Full Auto Light
Full Auto Light On/Off
Illumination Duration Setting

Other Functions

Date Display Setting
Button Operation Tone On/Off
Reset

Other Information

City Table
Specifications

MA2509-A

OPUM-J