This manual explains the safety precautions that must be observed before using the Casio 5161JA watch, including warnings about improper handling, diving use, and battery safety. It also describes the watch’s main functions such as alarm, stopwatch, timer, world‑time display, and power‑saving features.
Instructions for setting the time, using the alarm and timer, and maintaining the watch and its band are provided. The guide emphasizes keeping the solar cell exposed to light for charging, proper band cleaning, and the importance of not disassembling the watch or replacing the dedicated secondary battery with other types. This manual is written in Japanese.
| Power source | Solar cell with rechargeable secondary battery |
|---|---|
| Battery type | Button cell (non‑removable secondary battery) |
Expose the watch to sufficient light; the solar cell charges the internal battery while you wear it.
No. Disassembling the watch can cause injury or damage to the device.
Keep the band clean with a soft cloth, avoid seawater exposure, and dry it after use.
Use only the dedicated secondary battery that comes with the watch; do not replace it with other batteries.