The document discusses an optional security system upgrade that adds motion-activated cameras called MotionViewers. It can add up to 24 devices and customize the system. The MotionViewers are not for surveillance and only record brief video clips during alarms to protect privacy. They operate for up to 4 years on batteries so there is no need for wiring or ability to view them remotely unless an alarm is activated. The system is meant to provide security, not surveillance.