I want to setup an Arduino Nano with Chenbo MAX446 Electret Microphone Amplifier Module breakout board to wirelessly connect to an external bluetooth speaker so I can use the Arduino to transmit my voice wirelessly to the bluetooth speaker and out to the masses. I plan on running this off a 9v battery with a step-down to 5v.
I am trying make the transmitter as small as possible (hence why I am using an Arduino Nano instead of an Arduino Uno). I know that I will need some type of bluetooth shield/board but which? It will be a short range to the speaker so not sure about fighting a possible feedback loop from mic to speaker as well.
Any help on hardware selection and coding would be awesome!