Volume Booster

音量和亮度控制器，有益的，如果硬件密钥不工作

Volume and Brightness Controller application controls sound and brightness of smart phone and tablet.

some useful features are :

*controls system sound,

*ringtone volume,alarm sound

*media and notification sound.

*Also control brightness of android devices.

*Auto window popup during call for setting voice call volume.

*Most Helpful in case, your hardware key is not working.

*Easy and Handy application.

*at the time of calling app suggest volume control