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This wireless smoke detector has a battery life of up to 10 years and is supplied with screws and plugs. The Alecto SA-300 smoke detector is ultra-thin, only 2.35 cm and has a stylish and unobtrusive design, which was awarded the Design Award in 2019. If there is smoke or fire in the house, the detector will sound an alarm very quickly. A loud alarm that you will definitely hear, even in your sleep.