Alarm central units, anti-intrusion alarms, burglar alarms, personal security alarms; radio, video and digital signal transmitters, receivers and switches, antennas, electronic locks, and voice and video communication hubs; remote control units, computer keypads and electric control panels for security systems, alarm central units, anti-intrusion alarms, burglar alarms, home and business surveillance systems, lighting controls, home and office automation systems; computer software used to ope...