Alarm volume: 10 feet to 85 dB * Fire Smoke Detector Alarm, general purpose ideal for all areas : house, shop, hotel, restaurant, office building, school, bank, library, computer house and storehouse etc. * Alert and warn people stay far away from danger field when it detected smoke. * The detector adopts the special structure design * and ASIC, has the dustproof, mothproof and anti outside light interference feature etc.