Got it! I have the original which doesn’t have the outdoor equalizer option. And the manual as you saw doesn’t even offer a clue either! Did you try reviewing the support site? WonderBoom 2 FAQ
All I could find is this question listed in Ultimate Ears (UE) support site:
What does the button on the Bottom of the WonderBoom 2 do?
There's a button on the bottom of the speaker with a little tree on it. Once activated, it increases the speaker's overall volume and frequency response. This mode reduces bass, while upper mids and highs become more present; this allows the speaker to push more sound without distorting (read: it's a lot louder).
OK, what happens when you press and hold the indented space? Also try two presses quickly. If the button is not responding then it might be a bad unit. UE Support Contact info
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Review this guide WonderBoom2 manual
Can you point to the illuminated outdoor tree icon? You speak about
Or, if you can post a picture so we can see what you are seeing Adding images to an existing question
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
@danj see edited post
crwdns2934271:0crwdnd2934271:0 Amberlee Faint crwdne2934271:0