Features:
 - Stereo headphones have a 23-foot range
 - Adjustable headband
 - Automatic on/off input selector
 - Ni-cad battery (included) lasts 35 hours between charges; AA batteries (optional) have 100-hour life span
 - Deep bass drivers
 
  
 Description:
  The Sony MDRIF330RK allows you to listen to wireless stereo headphones over a 23-foot range, and at an angle up to 90 degrees from the source.  The self-adjusting headband allows you to comfortably fit the open-air stereo to your own head. Thirty-millimeter speaker drivers deliver deep bass sound, and an automatic on/off selector allows you to choose your input.   It comes with a ni-cad battery that can last up to 35 hours. Optional AA batteries, which can last up to 100 hours, can be used as well. 
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