This product features a unique structural design and an intelligent MCU to process photoelectric signals. It is dust-proof, mothproof and has anti-light interference function ability.  This ensures that the detector has stability from design basis and is suitable for all kinds of installation. It reacts quickly to visible smoke released by smoldering fires and flaming fires. The alarm is suitable houses, factories, shopping malls, hotels, restaurants, office buildings, schools, banks, libraries, warehouses, etc..