Internet-connected cameras are a great way to keep tabs on your home, but they only give you part of the picture. Literally. Complete it with a Notion Home Monitoring System. It uses a Wi-Fi connected bridge and battery-powered sensors to give you more information about your home. Each sensor can detect movement, loud noises, and water leaks, notifying you if anything's amiss. They can also tell the temperature, and integrate with the Nest thermostat, giving it the ability to make sure every room in the house stays comfortable. Available as a starter kit with a bridge and either three or five sensors, with extra sensors available separately.