The FireAngel Multi-Sensor Smoke Alarm in White is a reliable smoke detector that operates on both battery and hardwired power sources. It features a battery backup system for added peace of mind during power outages. This alarm is designed to detect smoke effectively and provide early warning in the event of a fire, ensuring the safety of you and your loved ones. With one battery included and the option to purchase additional batteries, this smoke alarm is a practical and essential choice for any home.