By pushing the sound booster's volume button you can:

* make the phone ring louder; * listen to music at maximum volume; * play video with maximum volume.

HOW TO USE THE SOUND BOOSTETR / VOLUME BOOSTER:

* open the sound booster / volume booster;* press the sound button;* wait for the sounds to be maximized;* minimize the sound booster app to have all the sounds maximized.

When you close the sound booster / volume booster, the sounds will be restored to their previous level.

This soundbooster / volume booster adjusts the volume for all audio streams of the phone, even on the phones on which this is not possible:

* Alarm sound;* DTMF (keypad dialing sound);* Music volume;* Notifications volume (SMS, E-mail, etc);* Phone ringer volume;* System sounds volume (battery low, etc);* Voice call volume.

Thanks!