Yes. Quote from the UE Boom 3 FAQ: "PartyUp allows you to connect multiple speakers together. To join the party, you first need to download the "BOOM & MEGABOOM by Ultimate Ears" app and install the latest firmware for the speakers. The latest version of the app is available in the iOS App Store or the Android Play Store. After installing the latest version of the app, updating the speaker firmware is possible via the app via OTA (Over-the-Air). Make sure that all speakers that are to join the party are updated with the latest firmware. NOTE: If the guest speaker is not set up as a public speaker, a message with an additional step will be displayed before it can join the party. The owner of this speaker must press the Bluetooth button twice on their speaker."