Β3 GS collection professional Karaoke speaker is the excessive grade professional speaker for business KTV leisure. With the APP, you may experience the effects KTV karaoke rooms and functions Operation: A:Bluetooth Mode (sing with bluetooth microphone) If you would like Q7 as a bluetooth speaker, turn off Q7’s echo and volume.Bluetooth have memory operate,when mobile phone is restarted,it may be … Continue reading Server Busy