ADT is a holding company. Through its subsidiaries, Co. provides security and smart home solutions serving residential, small business, and commercial customers in the U.S. Co. provides monitoring services as well as delivers lifestyle-driven solutions via installed, do-it-yourself, mobile, and digital-based offerings. Co. primarily provides its portfolio of products and services under its ADT brand, which includes burglar alarm, security automation, and other smart home solutions and fire detection, suppression, and access control systems (referred to collectively as security systems, solutions, or offerings), as well as solar systems and energy storage solutions for residential customers.