it can help your phone make sound louder than the system default.increase speaker and headphone loudness and the music volume of your mobile phone. It is a simple sound amplifier and music player booster that makes your phone extra louder Boost the volume of any sound in your headphones adjust and balance audio, while we will provide some equalizer presets to make your music experience even better. Main Feature: ☆ Music equalizer ☆ Bluetooth Booster ☆ Headphone Booster ☆ Speaker Volume ☆ Extra volume booster ☆ Call volume Note : Do not play audio at high volume for too long, which may damage your ears.