Sony PCV-RZ50N Manual

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Setting up the remote control 
Insert two AA batteries (supplied) into the remote control as shown. 
  Inserting batteries into the rem ote control 
  
 
If your remote control does not operate properly, you may need to replace the batteries. 
If your remote control is not being used for extended periods of time, remove the batteries to avoid possible damage from
battery leakage. 
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