CASIO CTK-900 user manual
User Manual
This document provides important information for using the CTK900-ES-1 model CASIO keyboard. The document includes precautions before use, such as using appropriate batteries, correctly connecting battery polarity, etc. It also advises against using rechargeable batteries, mixing old and new batteries, etc. Additionally, the document mentions the use of the CASIO AD-5 adaptor and FCC regulations for using the device in the USA.
