Oster Electronic Wine Vacuum Cork User Manual page 11

What do I do if the display reads "Lo"?
This means the batteries are low and should be changed.
Remove old batteries and replace with new AAA alkaline
batteries (refer to the "Installing the Batteries" section of
this Instruction Booklet).
What do I do if the device reactivates itself?
This is normal. Most vacuum seals lose their vacuum over
time. With our unique Two Stage process, the device
senses this loss in pressure and reactivates the 2nd stage
automatically to ensure a better vacuum seal.
Can I store my wine bottle with vacuum cork in the
refrigerator on its side?
The unit is leak resistant and can be laid on its side; however,
because of the automatic tilt shut off feature the unit will
not be able to perform the vacuum process. Also note that
cold temperatures may reduce the battery's performance.
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