What is a common tool used by security personnel to monitor premises?

Surveillance cameras are widely recognized as essential tools for security personnel tasked with monitoring premises. They provide continuous observation and recording of activities in various locations, allowing security teams to assess situations in real-time or review footage later for investigations or evidence. This technology helps enhance safety, deter crime, and ensure compliance with regulations.

In contrast, while flashlights are useful for illumination, particularly in low-light conditions, they do not provide ongoing monitoring capabilities. Police radios serve a crucial role in communication among law enforcement but do not directly monitor premises. Safety cones assist in directing traffic or marking hazards but do not contribute to monitoring activities within an area. Thus, surveillance cameras are the most effective and relevant choice for the purpose of monitoring premises.