点击进入放大器按钮。 将音频增益滑块向右滑动。 点击左下角的电源图标。 再次点击电源图标关闭放大功能。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This will open the amplifier settings for your microphone. This will boost your microphone's audio level by adding extra audio gain. Increasing audio gain too much may deteriorate your sound quality. It's recommended to keep it between 15 and 25. This will enable and apply the audio gain boost to your Android's microphone. You can now make a call or record voice clips with your boosted microphone. You can open the Microphone Amplifier app and turn it off anytime you want.