知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 A home security method frequently functions by putting in differing kinds of sensors, such as movement sensors all over different parts of the house. The control panel will arm or disarm the method and can audio an alarm if a security place is triggered. Do it yourself https://home-security00407.webbuzzfeed.com/34364921/helping-the-others-realize-the-advantages-of-door-security-services