Only Ultimate Ears Bluetooth speakers can pair with each other. These include:
BOOM, BOOM2, BOOM3, MEGABOOM, MEGABOOM3, HYPERBOOM.
ULTIMATE EARS speakers NOT included are: ROLL, ROLL2, WONDERBOOM, AND WONDERBOOM2.
*Please make sure you have upgraded to the latest firmware on all of the speakers using the Ultimate Ears BOOM app before you PartyUP with them.