B - Equalizer serves to provide the desired audio effects such as bass booster, reverb, volume booster, power amplifier, and even to change the input output sound gain of music to be stronger. Make your handset or earphone feels pro. This will make Bluetooth audio sound quality much better than before.
With the 15-Band 2/3 Octave Graphic Equalizer you can more freely try to increase the sound quality so that it becomes better. Working automatically when new audio session is detected from media player.

Basic Features for android 7 (Nougat) & 8 (Oreo) :