after using the "max" Speaker Booster mode you can easily go back to the initial volume state by clicking on the "normal" mode and when you are on any occasion that needs silence you can simply click on the "silent" mode"
Raising The Sound Amplifier with user-friendly interface, ultra-small capacity will help you improve the sound of your phone by 30% to 40% with one touch without distorting the sound.

Feature:
1. A key to increase the entire volume of sound flow to the maximum, no need for the speaker volume independently louder,
2. A key to putting your phone in silent mode, it is so convenient when you are on a meeting or going to bed.
3. A key in normal mode to restore the original custom phone sound.
4. System volume amplifier
5. Does not distort the sound while increasing
6. Flexible control