This document is an instruction manual for a watch, describing its functions and how to use it.
This manual explains the functions of the Casio 3171 watch, including timekeeping, illumination, and secondary time display. It describes how to set the time and date, switch between modes, and use the lighting feature.
The guide also covers safety and care information such as waterproof handling, skin irritation warnings, and detailed battery replacement procedures, recommending service by an authorized Casio dealer. This manual is written in Chinese.
Battery replacement should be performed by an authorized Casio dealer or service center, and only the battery type specified in the manual must be used.