You can connect 2 JBL party speakers from the same model to each other with JBL True Wireless Stereo. You don't need an app for this. With the stereo pair, you hear spatial audio. This way, music sounds more realistic and it's like the music is played live in the room. So you can enjoy the music even more. Connecting the speakers is easy. Press the Bluetooth button on both speakers. After a few seconds, you hear a sound and the speakers are connected. With newer models, you press the TWS button on both speakers. You can also do this in the JBL PartyBox app.