purchased 2 of these at costco 6 feb 16.they both started acting up 20 jan 18.
beeping sound and occasion light flashing through out day and night. one flashes occasion during the night so bright it wakes me up. of course if your some alarm flashes how can you go back to sleep. i agree, the 9 volt battery alarms are the way to go at least you can change the batteries once or twice a year.
with a peace of mind and sleep. save your money and DO NOT purchase the first alert model no.
p1210.this will prevent you from joining the rest of us unhappy buyers.