Sony DSR-200 Operating Instructions Manual page 12

Identifying the parts
To prepare the Remote Commander
To use the Remote Commander, you must insert two size AA (R6) batteries. Use the
supplied size AA (R6) batteries.
(1) Remove the battery cover from the Remote Commander.
(2) Insert both of the size AA (R6) batteries with correct polarity.
(3) Put the battery cover back onto the Remote Commander.
Note on battery life
The batteries for the Remote Commander last about 6 months under normal operation.
When the batteries become weak or dead, the Remote Commander does not work.
To avoid damage from possible battery leakage
Remove the batteries when you will not use the Remote Commander for a long time.
To use the Remote Commander
Make sure that the COMMANDER is set to VTR4/ID in the menu system on the digital
camcorder.
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DSR-200 U/C 3-858-622-22(1). E