Most home security systems have a variety of components which can include motion detectors, glass break detectors, and door contacts, as well as a keypad that allows users to input codes to disarm and arm the system. These components can either be hard wired, which requires a contractor to drill and run wires throughout the house, or wireless, which allows for easy installation and replacement. Some Internet and cable companies also offer security systems.
Many of the best rated security systems are now wireless, with LCD touchscreen keypads, the ability to arm, disarm, and monitor the system via a smartphone app, and a wireless connection to a monitoring station. Some systems have the ability to integrate home automation, such as lighting and thermostat control, by connecting these devices to the keypad via wireless connections.
While some systems still require a landline to connect to monitoring services, most of the latest systems now feature a wireless link that uses cell signals to connect to the central station, eliminating the need for extra wires. Typically, all home security systems require users to pay a monthly fee for monitoring, and many municipalities require an alarm permit to offset the costs of responding to alarms.