1. Turn on the Rave NEO
2. Connect Rave Neo to the phone through Bluetooth. And then turn on the Flare 2
3. After the Rave Neo is connected with the phone, long-press the PartyCast button of Rave Neo and the Bluetooth button of Flare 2 for more than 3s
4. Flare 2 will auto search Rave Neo and then successfully connected.