A:AnswerThe remote RM-RK258 is not for a theater system it is for certain model car radios only. You may want to get online to see what options for a remote are available for your theater system or contact JVC directly.
A:AnswerNone of the JVC line radios have the option to mute. You can lower the volume on the unit itself. As for the remote the compatible remote RM-RK258.