The manual introduces the functions and usage of the watch, such as time calibration, automatic sleep, alarm function, etc.
This manual provides detailed instructions for using the Casio 2609/2639 solar‑powered watch. It covers power management, battery indicator levels, charging procedures, and illumination features.
The guide also explains how to receive automatic and manual time‑calibration signals, set time, date, world time, daylight‑saving time, alarms, stopwatch, and other functions, as well as troubleshooting tips for signal reception and sleep mode. This manual is written in Chinese.
| Power source | Solar cell and rechargeable battery |
|---|---|
| Illumination | EL (electroluminescent) panel |
| Battery indicator levels | Four levels; level 4 disables all functions |
| Calendar range | Displays dates up to year 2099 |
Place the watch in a bright area and press any button or rotate the watch to activate automatic illumination, which wakes the watch.
Align the watch’s solar panel (the watch face) with a light source; the solar cell will charge the internal rechargeable battery.