This manual introduces the functions and operating methods of CTK481/491.
This document serves as the official User's Guide for the CASIO CTK-481 and CTK-491 electronic musical instruments. It provides essential guidelines laid down by FCC rules for use in the U.S.A., including specific warnings regarding battery usage, AC adaptors, and environmental conditions to ensure safe operation.
Do not rub your eyes; rinse them with water immediately and contact your physician.
No, you should never attempt to recharge batteries or use rechargeable batteries.