This manual introduces the operation of CASIO watch 5121 MA1003-ChA, including the functions of the watch hands, how to check the watch power, how to set the home city and daylight saving time, how to set the time and date, etc.
This manual provides step‑by‑step instructions for operating the Casio 5121 watch, including how to charge the solar‑powered battery, configure the residence city and daylight‑saving settings, and use functions such as the radio‑controlled time signal, world‑time, alarm and stopwatch.
It also covers power‑saving modes, automatic and manual pointer‑calibration, and a troubleshooting guide for low battery, signal‑reception problems and pointer misalignment. This manual is written in Chinese.
| Accuracy (no signal) | ±158 seconds per month |
|---|---|
| Battery life (full charge) | ≈ 5 months |
| Stopwatch measurement limit | 23 min 59.99 s |
| World‑time zones | 29 cities (29 time zones) |