iRobot Roomba 900 Owner's Manual page 21

Use Instructions
There is a ring of light around the top of the device. The ring will pulse
5 times when the device is turned on, or when a new mode is selected.
Select the desired mode. When the ring stops pulsing, place the device
on the floor in the desired location. The ring of light will remain off until
the batteries need to be replaced (2x AA batteries).
When Not in Use
In between cleaning cycles, you can leave the device operating in its
position on the floor.
Note:
Under normal use, batteries will last 8-10 months. If you are not planning
on using your Virtual Wall device for an extended period of time and you would
like to store it, be sure to switch it to the "Off" (middle) position.
Roomba 900 Series Owner's Guide
®
EN
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