The ADT security system has been around since 1874(!), and the system is so longstanding and widespread that it’s worth mentioning just for its reputation. ADT is so well-known that its blue hexagon alone may make a criminal think twice. “I’ve had only good experiences with ADT. Something they bring to the table is years of experience,” says Ben Michael, an Austin defense attorney who …

https://www.reviews.org/home-security/best-home-security-systems/