按此钮发动引擎。

Press this button to start the engine.

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遇火灾时按下此钮。

Press this button in case of fire.

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麦克风增益按钮，按下此钮会激活固定在麦克风内的衰减器，它是当本机工作在高噪音环境下使用。

Mic GAIN button. Pressing this button activates the built-in microphone attenuator. This feature is designed to be used when operating the Alan 9001 in high ambient noise environments.

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