Check Battery Level; Magic Button – Launch Playlist Setup - Ultimate Ears BOOM 3 Faq

CHECK BATTERY LEVEL

SIMULTANEOUSLY PRESS the "+" / "–" button to check battery
level.
MAGIC BUTTON – LAUNCH PLAYLIST SETUP
Search for and download the BOOM & MEGABOOM by Ultimate Ears app

from the Apple App Store or Google Play Store. Please be sure to download
the latest version of the app. BOOM 3 AND MEGABOOM 3 are only
compatible with the BOOM & MEGABOOM by Ultimate Ears app. These
speakers will not work with the BLAST & MEGABLAST app by Ultimate Ears
app.