Do you have a question about the JGC JGC-ML-400 and is the answer not in the manual?
Read manual, use as intended, household use only, do not open, supervise children, use approved accessories, avoid extreme volume.
Avoid water, moisture, heat sources, fire, extreme temperatures, and direct sunlight.
Proper insertion, polarity, avoiding heat/fire, not short-circuiting, removing when unused, supervision, non-rechargeable rules.
Guide for unpacking, checking contents, and inserting batteries correctly.
Steps to connect the audio cable, switch on, adjust volume, and switch off.
Instructions for cleaning the housing and common troubleshooting steps for operational issues.