Turn on the Rave NEO 1( RN1)---  connect to the phone through BT--- After connection, long press(more than 3s) the PartyCast bottom ( RN1) ---Turn on the Rave NEO 2 ( RN2)---   long-press the PartyCast bottom ( RN2) ---short press PartyCast bottom ( RN2) ---RN2 will auto search RN1 and then successfully connect.