Keep your home safe and secure from the danger of slow smouldering fires with this FireAngel SB1-R smoke alarm. Thanks to the built-in optical smoke sensor the SB1-R is great at detecting smoke at the early stage, when a fire is still building. It is also less prone to nuisance alarms due to its toast proof design, meaning you wont have to run to silence it during breakfast. This smoke alarm is perfect for placing in a bedroom, living room, dining room, landing or hallway. Features and Benefits Battery powered optical smoke alarm Large central test and silence button Toast proof designThe SB1-R is less prone to false alarms like burnt toast. Guaranteed battery lifeGuaranteed to last a whole year with the specially designed battery. Specifications Power source: 9V PP3 battery (included) Optical smoke sensor Toast proof design Battery life: 1 year Guarantee: 3 years