Sony RNPK-4 Help Manual page 22

The temperature of the cooling/warming section rises more than expected.
For details, refer to "When the LED flashes in
Hint
You can stop warming by pressing and holding the button on the unit for about 2 seconds. It is useful when your smartphone is
running out of battery.
You can set a series of actions to alternate between cooling and warming (MY MODE).
Related Topic
SMART COOL settings
SMART WARM settings
Using MY MODE
red."
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