Your ADT alarm system has batteries located in the battery drawer in the back of the master keypad. If your system has remote wireless sensors, they also have batteries. The main alarm system uses ...

Founded in 1874, ADT is a well-known international provider of residential alarms and security services. ADT residential alarms and security systems have sensors that carefully monitor your home and ...

Learn about one of the best-known professionally monitored home security providers in this ADT Security Systems review and see if it’s right for you.