International CQ-5400U Operating Instructions Manual page 8

Power and Sound Controls
Press and hold
7
Mute
Press [MUTE] to mute the sound completely.
●
Press [MUTE] again to cancel.
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Selecting Auxiliary Source
(Only for CQ-5400U)
Press and hold [MODE] (AUX) for more than 2 seconds to select
AUX Input mode.
Connect the auxiliar y equipment (any other appropriate
equipment) to AUX IN Connector.
Canceling AUX Input mode
Press [MODE] (AUX) to resume the previous mode.
(continued)