Casio LK-56 - Manual (Page 20)

E-18
Microphone Jack
You can connect a commercially available microphone to the
microphone jack and sing along with notes played on the
keyboard. For details, see “Using a Microphone for Sing
Along” on page E-32.
Accessories and Options
Use only the accessories and options specified for this
keyboard. Use of non-authorized items creates the danger of
fire, electrical shock, and personal injury.
Connections
642A-E-020A
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