This manual is about the use of CASIO watches, mainly introducing the features of the watch, such as using solar batteries and the need for light exposure.
This manual provides step‑by‑step instructions for using the Casio 3221 watch, including time setting, world‑time selection, alarms, stopwatch, timer, illumination, and power‑saving features. It also contains safety warnings and charging guidelines for the built‑in solar cell and rechargeable battery.
The document details each function’s operation, how to adjust settings with the @ and @@ buttons, and provides specifications such as accuracy, calendar range, and battery life. It is intended for end users who need to configure and maintain the watch. This manual is written in Chinese.
| Accuracy | ±15 seconds per month |
|---|---|
| Time format | 12‑hour and 24‑hour |
| Calendar range | 2000‑2099 (automatic) |
| World time cities | 48 cities (31 time zones) |
| Stopwatch resolution | 0.01 s |
| Stopwatch limit | 23:59:59.997 |
| Illumination | EL panel, auto‑illumination, selectable 1.5 s or 3 s |
| Power source | Solar cell + rechargeable battery |
| Battery life | ≈1 month from full charge to level 4 |