When shopping for a system, review software platforms first. Alarm. com and iControl are the two biggest. The former has partnered with more than 2,500 dealers and the latter with ADT and Comcast. Among other things, you’ll have to decide between a “cellular primary” or “broadband primary” system. The former is a wireless connection to the monitoring station, making it immune to power outages or someone cutting a cable. It is limited, however, with regard to transmitting large quantities of video, so many cellular primary systems incorporate broadband for video. Broadband primary services, on the other hand, have cables running down the side of a house that can be cut, thereby disabling the system. Some services offer cellular back up should this occur. Look for a home security system with a full line of wireless peripherals, including modules for controlling lights and appliances, thermostats, cameras, motion sensors some can distinguish between a pet and a person, water sensors, and glass break and vibration sensors. Look for long life battery power, too.