PartyUp allows you to connect or group multiple Ultimate Ears speakers together. To join the party, you’ll first need to get the Ultimate Ears BOOM app and the latest firmware for your speakers. Check the iOS App Store or the Android Play Store for the latest app update. Once you have the latest app, you can update your speaker firmware through the app via over-the-air (OTA). Just follow the steps in the app.
You should also make sure that all the speakers that you would like to join the party are up-to-date with the latest firmware.
NOTE: If the guest speaker is not set as a public speaker (via the app), you will see a message with an extra step before that speaker can join the party. The owner of the speaker will need to press the Bluetooth button twice on their speaker.