MSA - Alarms and Communication Devices

The main purpose of alarms is usually to alert people about something. A flashing light or strobe light, for example, may be used to let people know about a possible hazard or danger. Communication devices, such as radios and walkie talkies, are helpful for facilitating the process of communication between different groups of people, even when they are far apart. A two-way radio system, for example, can be used in a factory or at a construction site to allow different workers to speak with each other.