Pair any two SmartMike+s in M/S mode and connect either of the two paired SmartMike+s to a mobile phone via Sabintek TRRS 4 pole connector as a receiver. The other paired SmartMike+ acts as wireless microphone for recording. Any live streaming app such as Facebook can acquire the wireless audio from SmartMike+ in live broadcasting. Meanwhile, for any music apps that play music on mobile, , the music will mix into the as background music for live broadcasting. Please note that volume change of music is necessary to ensure the BGM is in proper level. And the BGM could be monitored via earphone via a 3.5 mm jack on the SmartMike+.