If you are trying to update the speaker but the UPDATE button doesn't light up, please check the following.
- In order to update your speaker make sure that it is connected to an AC outlet, as software updates are not available when the speaker is being powered by the built-in battery.
Connect the speaker to an AC outlet via the USB AC adaptor to update.
- When the system software is already updated to the latest version, the UPDATE indicator will not light up.
NOTE: The software version of the speaker can be viewed from Settings > Other settings of the Music Center (SongPal) application.