Ear Force X2 - FAQs
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Conserve Battery Power - Misprint - Errata 
The Earforce X2 Operating instructions (First Edition) read:

PLEASE NOTE: 
    To conserve battery power, the X2 headphones automatically power off after
    one hour without a signal. To use the headphones after 
    they have auto-shut down, turn the power switch to the "off" position,
    then "on" again.

This is a typo. The correct time for power off is about 2 minutes. We are
sorry for this inaccuracy.
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