Sony PetaSite DMS-B150L Installation Manual page 22

4-1. AC Power for DMS-B150L/B210S/B80L/B110S
How to use the plug holder
Protect the plug using the plug holder so that the plug cannot be easily removed from AC outlet.
Plug holder
4-2
After the power cord plug is securely connected to AC outlet, attach the
plug holder to the power cord.
In order to remove the plug holder, remove the power cord while
pressing the two levers as shown.
DMS-B150L/B210S/B80L/B110S/EX150L/EX210S