Sony MPK-TRV3 Operating Instructions Manual page 13

(4) Attach the front shell to the rear shell.
Now you ready for underwater recording.
Set the STANDBY/LOCK switch of the marine pack to LOCK.
If you set it to STANDBY, the battery may be used up before recording.
1 Put the front shell on the rear shell.
2 Press the top of both grips frimy.
3 Lower both buckles at the
same time until they are
locked. You will hear a click.
Align here as
shown in the
illustration.
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