Instead of purchasing costly new devices and paying even more to have them installed, Roost empowers easy and inexpensive do-it-yourself upgrades to existing smoke alarms. There are no new smoke/CO alarms to purchase. No unnecessary control panels. No bulky hubs to hide. Connect the Roost Smart Battery to your home Wi-Fi network, replace the existing 9V battery in your smoke alarm with Roost and immediately receive emergency alerts on your smart phone—no matter where you are. Now that's smart. Roost is a start-up technology company headquartered in Sunnyvale, CA. Roost has developed a unique, patent-pending connected platform that delivers the ultimate in installation simplicity and the most affordable way for consumers to enter the smart home space. Learn more at http://getroost.com/