Sirius Satellite Radio XTR3CK Instruction Manual page 26

3. Rotate the Channel Up/Down Rotary Dial until "Y" is selected press the Select button to confirm.
4. Rotate the Channel Up/Down Rotary Dial until "N" is selected press the Select button to confirm.
One minute prior to the Auto Shutoff feature, the display will flash the message Shut Off?
Pressing any button or turning the Channel Up/Down Rotary Dial will defeat the Auto Shutoff feature.
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