This document is the user manual for CASIO watch 5121 MA1003-CkA, including instructions for watch functions, time setting, and charging.
This manual explains how to operate the Casio 5121MA1003-CkA solar‑powered watch, including charging the internal battery with light, selecting local and world cities, and using the stopwatch, alarm, and power‑saving functions. It also details the wave‑signal time‑calibration feature and how to prepare the watch for signal reception.
The guide includes step‑by‑step procedures for manual time and date setting, automatic and manual pointer‑calibration, troubleshooting common issues such as low power or signal loss, and specifications such as accuracy, battery life, and supported radio‑signal stations. This manual is written in Chinese.
| 常温下的精确度 | 每月 ±15秒（无校准信号时） |
|---|---|
| 电池供电时间 | 约5个月（手表充满电后） |
| 电源类型 | 太阳能电池及充电电池 |
| 秒表测量限度 | 23′59.99″ |