Passive infrared motion detectors (PIR) and magnetic sensors (reed relay switches) installed in windows, walk-in doors and garage doors are the solutions most commonly used in alarm systems. The systems are generally armed/disarmed by entering a specific access code set by the user, using a keypad. Alarm systems are not complicated for the user to operate and significantly increase the security on site. Modern alarm systems enable remote control and monitoring of the secured site from an app on a phone or tablet. Very often, alarm system components include video surveillance solutions, which are cameras, displays and recorders that acquire and store video feeds for a specific period of time for review during or after a possible threat.
Intercoms are devices that facilitate voice communication between a handset installed indoors and the doorbell kit installed at the front door or the gate to the premises. This communication operates over short distances without the involvement of an exchange unit. Their primary purpose is to provide security and access control and to remotely open exterior doors or gates, while the front door bell integrated with the kit is to sound when a visitor comes around. When choosing a specific device, it is important to understand its performance and functions, as well as its appearance, which should fit in with the interior.