A:Answer Thanks for your question. Our JBL Boombox 1 cannot be linked to the JBL Xtreme 3 due to incompatible technologies. Xtreme 3 has the PartyBoost feature, which can be connected to the same PartyBoost, such as the JBL Xtreme 3, JBL Boombox 2, JBL Pulse 5, JBL Pulse 4, JBL Boombox 3, and JBL Flip 5. While the Boombox 1 has a Connect+ feature that can wirelessly link more than 100 JBL Connect+-enabled speakers, such as the Charge 3 upgraded version, Charge 4, Pulse 3, Flip 4, and Xtreme 2.