Which of the following is a common feature of modern alarm systems?

Smartphone integration for monitoring is a prominent feature of modern alarm systems, reflecting the advancements in technology and the growing reliance on mobile devices for convenience and accessibility. This feature allows users to monitor and control their alarm systems remotely, providing real-time notifications regarding their security status.

The ability to receive alerts or check surveillance feeds directly from smartphones enhances user engagement and ensures quicker responses to potential security breaches. This attribute aligns with current trends in smart home technology, which prioritize user-friendly interfaces and remote accessibility.

In contrast, manual operation only, use of analog signals exclusively, and limited alert options are characteristics of outdated systems that do not leverage modern technology to offer the flexibility and responsiveness that users expect in today’s interconnected world.