This manual explains the pre‑use requirements, how to charge the device using bright light or solar energy, and the proper handling of the dedicated rechargeable battery. It also covers automatic time‑sync settings for different residence cities and daylight‑saving adjustments.
The document details the power‑saving function that stops the hand movement and puts the timer into sleep mode, describes how to operate the countdown timer (up to 120 seconds), switch between timer modes, and provides troubleshooting tips for battery degradation and skin irritation caused by the wrist strap. This manual is written in Japanese.
| Power‑saving mode | Stops hand movement and enters sleep state |
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Place the device in bright light before use to charge the battery.
It automatically stops the hand movement and puts the timer into a sleep state after a period of darkness.
Press the alarm‑off button to stop the ringing.