Sony ULT FIELD 1 Help Manual page 15

Help Guide
Wireless Speaker
ULT FIELD 1
Using the speaker with less power consumption of the rechargeable battery
(STAMINA)
Reduce the power consumed while the speaker is running on the rechargeable built-in battery so you can use the
speaker for a longer period of time.
To use STAMINA
At the time of purchase, the STAMINA power option is set to off.
On "Sony | Music Center," tap [ULT FIELD 1] - [Settings] - [Power Option] - [STAMINA], and then set it to on.
While the STAMINA power option is set to on, the sound effects, including the ULT POWER SOUND, are set to off.
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