Here is everything else you can add to your home security system: Video surveillance: Additional devices: ADT yard sign: $8 ADT window stickers (4 pack): $3 Weatherproof cable for the Google Nest ...

I tested ADT's home security system over two weeks ... smoke and CO detectors alert you to signs of fire or gas leak, flood sensors tell you if water is pooling somewhere and glass-break sensors ...

More Google Nest integration and improved tech breathe much-needed life into ADT's new ADT+ home security system, but cost issues remain.

Similar to ADT home security systems, these medical alert devices connect to a 24/7 monitoring center. The company charges ongoing monthly fees for this service. The system has two primary components.