Wireless burglar alarms operate differently from their hard-wired counterparts in that the component parts (control panel, sensors and alarm) communicate via radio signals, rather than electrical wired connection across the whole system.

 When we talk about a physical access control system, we’re
usually referring to an electronic security system. They typically use an
identifier such as an access card or code to authorise people to enter certain …

Video door-phone (also known as video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by …