Well, the creators say that Leeo is designed to listen only to sounds from the alarms and nothing else, protecting your privacy. A closer look at their privacy policy reveals that the Leeo Smart Alert Nightlight gathers info about the surrounding area temperature, humidity and ambient light, but it also detects noise frequency and specific sounds makes short recordings of any detected alarm. The Leeo team uses the collected data to make predictions and suggestions, but also to alert the assigned contacts in case of an emergency. Overall, it’s an interesting product which can integrate a generic, non smart alarm system into an IoT environment, therefore, it’s a promising, future proof device. Roost RSA 400 Smoke/Fire/CO/Natural Gas Alarm was created to make the best use of the Roost Smart Battery, a device born from a crowd funded project similarly to Halo, but, this time, using Kickstarter and because of its unique abilities, it quickly became a very popular product. The Roost Smart Battery is equipped with a WiFi adapter, a microphone and, if used with an already existing smoke alarm, it can bring a new array of functions for an increased level of convenience and to make your home a lot safer after it gets connected to your home WiFi network, you get notifications in case of emergencies, when the battery is running low, allows snoozing in case of false alarms this feature did not work with hard wired alarms and an easy to use app to monitor your device.