If you witness some threat or if the child feels some danger in any situation, he can press the SOS button.
如果你看到某种威胁，或者孩子在任何情况下感到危险，他可以按下紧急求助按钮。
2
The color of the button implicitly suggested the consequence of clicking it, especially the red button, which suggested "danger" if the user clicked it but didn't mean to close the window.