Microphone Plus - Bluetooth Aux Cable or USB Mic is a free sound-amplifying app that is capable of boosting the volume level of the input from your Android device's microphone (or any compatible external mic) and transferring the audio to any Bluetooth speaker, audio device with a USB connection, or any other compatible device that is connected to your phone.

The Microphone Plus - Bluetooth Aux Cable or USB Mic app can be used with the Android phone or tablet. Its interface is easy to navigate and understand, and you will be maximising its purpose in no time.