The BRK First Alert Smoke Detector 9120B is a reliable and trusted smoke alarm that can protect your home with its battery backup feature. With the option for hardwired or battery power, this white smoke detector is compatible with Amazon Alexa for added convenience. Manufactured in various years starting from 2008, this model is lightweight and compact, making it easy to install and use in any home. Featuring smart home protocols for Bluetooth and Powerline/UPB, this smoke alarm is a crucial component for enhancing home security and peace of mind.