The IR light beam from the transmitter is received by sensors on each side 
of the headband, so the headphones must be within sight of the transmitter 
in order to operate properly.

INSTALLING THE BATTERIES:
  The headphones are powered by 2 AAA batteries (included) located in the 
  right ear cup. Lift the battery cover and insert both batteries before 
  operating the headphones.

  

POWER SWITCH:
  To turn on the power, quickly press and release the push button power switch
  on the left ear cup. To turn off the power, quickly press and release the 
  push button power switch (or, allow it to turn off automatically as
  described below).

  

POWER INDICATOR:
  The Turtle Beach Palm Tree Logo on the left ear cup will flash about once 
  per second when the power is on.

AUTOMATIC POWER SHUT-OFF:
  If there is no sound transmitted for more than a few minutes, the light 
  will flash faster to indicate that the headphones are about to "power down".
  After about two minutes, the power will automatically shut off to conserve 
  the batteries. To turn on the headphones after they have auto-shut down, 
  press the power switch as described above.
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