You can easily add new sensors to an existing SimpliSafe system. In fact, the process can be done using a phone or the SimpliSafe Keypad. Here's how it works.

The best home security systems are 1. SimpliSafe, 2. Ring, 3. Abode, 4. Arlo, 5. ADT and 6. Vivint. They include sensors, detectors, cameras and more.

Subscribers can stay informed about pertinent activity detected by the Flex IO sensor through real-time notifications and customizable alerts configured through the Alarm.com mobile app.

Reviews Meross Smart Wi-Fi Garage Door Opener review: A budget price makes this system worth the setup hassles If you need a wired controller, Meross’ option should be on your shopping list.