RS Pro 790-3381 Guide D'introduction page 9

Basic setup
Basic setup is as easy as A, B, C.
A. Fit the Batteries (Unless pre-fitted)
Your video inspection camera operates using either 3 x AA batteries or 3 x
AA rechargeable batteries. Remove the single screw in the battery cover
to access the battery compartment and fit the batteries into the battery
holder.
Note: Screwdriver not included
Ensure you insert the batteries with
the correct polarity.
Now replace battery cover and tighten
the retaining screw.
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