The FireAngel ST-625 Toast Proof Smoke Alarm provides superior home safety, rigorously tested to deliver the highest standard of protection for your family. Its durable design and simple installation make it ideal for bedrooms, hallways, and living areas. Featuring test, hush, and sleep-easy functionality, this battery-powered alarm alerts homeowners with chirps when the battery is low. Trusted by UK Fire and Rescue teams, the ST-625 offers peace of mind in any home environment. Designed to help keep your home safe and prepared against accidents, the FireAngel ST- 625 Toast Proof Smoke Alarm is perfect for any home environment. Trusted by the UK Fire and Rescue teams, this battery-powered smoke alarm even features test, hush, and sleep-easy functionality. Notifying home owns with warning chirps when the battery is low, the durable and easy-to-install smoke alarm is an essential addition to any bedroom, hallway, or living area. This FireAngel smoke alarm uses Thermoptek multi-sensor technology which pairs the the very latest in optical sensing with thermal enhancement, and when compared to single sensor alarms reacts to fire in under half of the time. It comes with replaceable batteries which will need replacing once you hear the low battery alert. This alarm cannot be connected to other alarms in your home.